diff --git a/UAssetGUI/FileContainerForm.cs b/UAssetGUI/FileContainerForm.cs
index d073422..9f1cafc 100644
--- a/UAssetGUI/FileContainerForm.cs
+++ b/UAssetGUI/FileContainerForm.cs
@@ -1,1447 +1,1452 @@
-using Newtonsoft.Json;
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Diagnostics;
-using System.Drawing;
-using System.IO;
-using System.Linq;
-using System.Runtime.InteropServices;
-using System.Text.RegularExpressions;
-using System.Windows.Forms;
-using UAssetAPI;
-using UAssetAPI.UnrealTypes;
-
-namespace UAssetGUI
-{
-    public enum InteropType
-    {
-        Pak,
-        Retoc
-    }
-
-    public enum RetocEngineVersion
-    {
-        UE4_25 = EngineVersion.VER_UE4_25,
-        UE4_26 = EngineVersion.VER_UE4_26,
-        UE4_27 = EngineVersion.VER_UE4_27,
-        UE5_0 = EngineVersion.VER_UE5_0,
-        UE5_1 = EngineVersion.VER_UE5_1,
-        UE5_2 = EngineVersion.VER_UE5_2,
-        UE5_3 = EngineVersion.VER_UE5_3,
-        UE5_4 = EngineVersion.VER_UE5_4,
-        UE5_5 = EngineVersion.VER_UE5_5,
-        UE5_6 = EngineVersion.VER_UE5_6,
-        UE5_7 = EngineVersion.VER_UE5_7,
-        UE5_8 = EngineVersion.VER_UE5_8,
-    }
-
-    public struct RetocManifest
-    {
-        [JsonProperty("oplog")]
-        public RetocOpLog OpLog;
-    }
-
-    public struct RetocOpLog
-    {
-        [JsonProperty("entries")]
-        public List<RetocOp> Entries;
-    }
-
-    public struct RetocOp
-    {
-        [JsonProperty("packagestoreentry")]
-        public RetocPackageStoreEntry PackageStoreEntry;
-        [JsonProperty("packagedata")]
-        public List<RetocChunkData> PackageData;
-        [JsonProperty("bulkdata")]
-        public List<RetocChunkData> BulkData;
-    }
-
-    public struct RetocPackageStoreEntry
-    {
-        [JsonProperty("packagename")]
-        public string PackageName;
-    }
-
-    public struct RetocChunkData
-    {
-        [JsonProperty("id")]
-        public string ID;
-        [JsonProperty("filename")]
-        public string FileName;
-    }
-
-    public partial class FileContainerForm : Form, ILocalizable
-    {
-        public IDictionary<TreeView, DirectoryTree> DirectoryTreeMap = new Dictionary<TreeView, DirectoryTree>();
-        public string CurrentContainerPath;
-        public IDictionary<TreeView, bool> FlatViewEnabled = new Dictionary<TreeView, bool>();
-        public IDictionary<TreeView, string> Filter = new Dictionary<TreeView, string>();
-        public PakVersion Version = PakVersion.V4;
-        public InteropType InteropType = InteropType.Pak;
-        public string MountPoint = "../../../";
-        public static string RetocExtraCommands
-        {
-            get { return UAGConfig.Data.RetocExtraCommands; }
-            set { UAGConfig.Data.RetocExtraCommands = value; UAGConfig.Save(); }
-        }
-
-        public FileContainerForm()
-        {
-            InitializeComponent();
-        }
-
-        public Form1 BaseForm;
-        public TreeView SelectedTreeView;
-        private void FileContainerForm_Load(object sender, EventArgs e)
-        {
-            this.Text = BaseForm.DisplayVersion;
-
-            UAGPalette.RefreshTheme(this);
-            this.AdjustFormPosition(BaseForm);
-
-            this.cutToolStripMenuItem.ShortcutKeyDisplayString = UAGUtils.ShortcutToText(Keys.Control | Keys.X);
-            this.copyToolStripMenuItem.ShortcutKeyDisplayString = UAGUtils.ShortcutToText(Keys.Control | Keys.C);
-            this.pasteToolStripMenuItem.ShortcutKeyDisplayString = UAGUtils.ShortcutToText(Keys.Control | Keys.V);
-            this.deleteToolStripMenuItem.ShortcutKeyDisplayString = UAGUtils.ShortcutToText(Keys.Delete);
-
-            this.loadTreeView.AllowDrop = true;
-            this.loadTreeView.DragEnter += new DragEventHandler(event_DragEnter);
-            this.loadTreeView.DragDrop += new DragEventHandler(loadTreeView_DragDrop);
-            this.saveTreeView.AllowDrop = true;
-            this.saveTreeView.DragEnter += new DragEventHandler(event_DragEnter);
-            this.saveTreeView.DragDrop += new DragEventHandler(saveTreeView_DragDrop);
-
-            menuStrip1.Renderer = new UAGMenuStripRenderer();
-            foreach (ToolStripMenuItem entry in menuStrip1.Items)
-            {
-                entry.DropDownOpened += (sender, args) =>
-                {
-                    isDropDownOpened[entry] = true;
-                };
-                entry.DropDownClosed += (sender, args) =>
-                {
-                    isDropDownOpened[entry] = false;
-                };
-            }
-
-            // extract repak_bind.dll if available
-            string libsPath = Path.Combine(UAGConfig.ConfigFolder, "Libraries");
-            string repakBindPath = Path.Combine(libsPath, "repak_bind.dll");
-            if (!HasAlreadyExtractedRepak || !File.Exists(repakBindPath))
-            {
-                HasAlreadyExtractedRepak = true;
-                Program.ExtractCompressedResource("UAssetAPI.repak_bind.dll.gz", repakBindPath, typeof(UAsset).Assembly);
-                if (File.Exists(repakBindPath)) NativeLibrary.Load(repakBindPath);
-            }
-
-            LoadContainer(CurrentContainerPath);
-            RefreshTreeView(saveTreeView);
-        }
-
-        public void Localize()
-        {
-            fileToolStripMenuItem.Text = UAGConfig.GetString("Menu.File");
-            loadToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.File.Open");
-            saveToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.File.Save");
-            stageFromDiskToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.File.StageFromDisk");
-            stageFromDiskToPathToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.File.StageFromDiskToPath");
-            editToolStripMenuItem.Text = UAGConfig.GetString("Menu.Edit");
-            cutToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Edit.Cut");
-            copyToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Edit.Copy");
-            pasteToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Edit.Paste");
-            deleteToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Edit.Delete");
-            viewToolStripMenuItem.Text = UAGConfig.GetString("Menu.View");
-            expandAllToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.ExpandAll");
-            collapseAllToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.CollapseAll");
-            toggleFlatViewToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.ToggleFlatView");
-            applyFilterToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.ApplyFilter");
-            refreshToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.Refresh");
-            utilsToolStripMenuItem.Text = UAGConfig.GetString("Menu.Utils");
-            extractAllToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Utils.ExtractAll");
-            setRetocCommandLineParametersToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Utils.SetExtraRetocParameters");
-
-            loadButton.Text = UAGConfig.GetString("FileContainerForm.Button.Load");
-            saveButton.Text = UAGConfig.GetString("FileContainerForm.Button.Save");
-        }
-
-        private static volatile Dictionary<ToolStripItem, bool> isDropDownOpened = new Dictionary<ToolStripItem, bool>();
-        public static bool IsDropDownOpened(ToolStripItem item)
-        {
-            if (!isDropDownOpened.ContainsKey(item)) return false;
-            return isDropDownOpened[item];
-        }
-
-        public void AddDirectoryItemChildrenToTreeView(DirectoryTreeItem treeItem, PointingFileTreeNode dad, string filter, bool forceAddChildrenOfChildren = false, bool disableDynamicTree = false)
-        {
-            if (!UAGConfig.Data.EnableDynamicTree) disableDynamicTree = true;
-            dad.ChildrenInitialized = forceAddChildrenOfChildren || disableDynamicTree;
-            foreach (KeyValuePair<string, DirectoryTreeItem> directoryItem in treeItem.Children)
-            {
-                if (directoryItem.Value.Children.Count > 0 || string.IsNullOrEmpty(filter) || directoryItem.Value.FullPath.Contains(filter))
-                {
-                    var newDad = new PointingFileTreeNode(directoryItem.Value.Name, directoryItem.Value);
-                    newDad.ChildrenInitialized = false;
-                    dad.Nodes.Add(newDad);
-                    if (dad.ChildrenInitialized) AddDirectoryItemChildrenToTreeView(directoryItem.Value, newDad, filter, false, disableDynamicTree);
-                }
-            }
-        }
-
-        public void ExpandedToHashSet(TreeNodeCollection nodes, HashSet<string> hashSet)
-        {
-            foreach (TreeNode node in nodes)
-            {
-                if (node is PointingFileTreeNode pftNode)
-                {
-                    if (pftNode.IsExpanded) hashSet.Add(pftNode.Pointer.FullPath);
-                    ExpandedToHashSet(pftNode.Nodes, hashSet);
-                }
-            }
-        }
-
-        // this method doesn't collapse already-expanded nodes
-        public void HashSetToExpanded(TreeNodeCollection nodes, HashSet<string> hashSet)
-        {
-            foreach (TreeNode node in nodes)
-            {
-                if (node is PointingFileTreeNode pftNode)
-                {
-                    if (hashSet.Contains(pftNode.Pointer.FullPath)) pftNode.Expand();
-                    HashSetToExpanded(pftNode.Nodes, hashSet);
-                }
-            }
-        }
-
-        public PointingFileTreeNode GetSpecificNode(TreeNodeCollection nodes, string fullPath)
-        {
-            foreach (TreeNode node in nodes)
-            {
-                if (node is PointingFileTreeNode pftNode)
-                {
-                    if (fullPath == pftNode.Pointer.FullPath) return pftNode;
-                    if (fullPath.StartsWith(pftNode.Pointer.FullPath)) // we know this is an ancestor node
-                    {
-                        if (!pftNode.ChildrenInitialized) InitializeChildren(pftNode);
-                        var gotten = GetSpecificNode(node.Nodes, fullPath);
-                        if (gotten != null) return gotten;
-                        break; // obviously no sibling node to this node can be also an ancestor node
-                    }
-                }
-            }
-            return null;
-        }
-
-        public PointingFileTreeNode GetSpecificNode(TreeView treeView, string fullPath)
-        {
-            return GetSpecificNode(treeView.Nodes, fullPath);
-        }
-
-        public PointingFileTreeNode GetSpecificNode(string fullPath)
-        {
-            var res = GetSpecificNode(loadTreeView, fullPath);
-            if (res != null) return res;
-            res = GetSpecificNode(saveTreeView, fullPath);
-            if (res != null) return res;
-
-            return null;
-        }
-
-        public DirectoryTreeItem GetFromPackageName(TreeView treeView, string packageName)
-        {
-            DirectoryTree tree = DirectoryTreeMap[treeView];
-            if (tree?.PackagePathToNode == null || !tree.PackagePathToNode.ContainsKey(packageName)) return null;
-            return tree.PackagePathToNode[packageName];
-        }
-
-        public void RefreshTreeView(TreeView treeView)
-        {
-            if (!FlatViewEnabled.ContainsKey(treeView)) FlatViewEnabled[treeView] = false;
-            UAGUtils.InvokeUI(() => RefreshTreeViewInner(treeView, FlatViewEnabled[treeView]));
-        }
-
-        private int PruneChildren(PointingFileTreeNode branchNode)
-        {
-            if (branchNode?.Nodes == null) return 0;
-
-            int n = 0;
-            for (int nodeIdx = 0; nodeIdx < branchNode.Nodes.Count; nodeIdx++)
-            {
-                if (branchNode.Nodes[nodeIdx] != null && branchNode.Nodes[nodeIdx] is PointingFileTreeNode pftn)
-                {
-                    if (pftn.Pointer == null) continue;
-                    if (!pftn.Pointer.IsFile && pftn.Nodes.Count == 0)
-                    {
-                        // directories with no children need to be removed
-                        branchNode.Nodes.RemoveAt(nodeIdx);
-                        n++;
-                        nodeIdx--;
-                    }
-                    else
-                    {
-                        n += PruneChildren(pftn);
-                    }
-                }
-            }
-            return n;
-        }
-
-        private void RefreshTreeViewInner(TreeView treeView, bool flatView)
-        {
-            if (treeView == null || !DirectoryTreeMap.ContainsKey(treeView)) return;
-
-            treeView.SuspendLayout();
-
-            // get existing expanded nodes
-            HashSet<string> FullPathsOfNodesToExpand = new HashSet<string>();
-            ExpandedToHashSet(treeView.Nodes, FullPathsOfNodesToExpand);
-
-            if (treeView == saveTreeView)
-            {
-                // update directory tree
-                string[] stagingFiles = UAGConfig.GetStagingFiles(this.CurrentContainerPath, out string[] fixedPathsOnDisk);
-                DirectoryTreeMap[treeView] = new DirectoryTree(this, stagingFiles, fixedPathsOnDisk);
-            }
-
-            if (!Filter.ContainsKey(treeView)) Filter[treeView] = null;
-            string filter = Filter[treeView];
-            bool filterExists = !string.IsNullOrEmpty(filter);
-
-            treeView.Nodes.Clear();
-            DirectoryTree currentTree = DirectoryTreeMap[treeView];
-            if (flatView && currentTree?.RootNodesFlat != null)
-            {
-                List<TreeNode> nodes = new List<TreeNode>();
-                foreach (KeyValuePair<string, DirectoryTreeItem> directoryItem in currentTree.RootNodesFlat.OrderBy(p => p.Value.FullPath))
-                {
-                    // we can just filter here because in flat view nodes never have children
-                    if (string.IsNullOrEmpty(filter) || directoryItem.Value.FullPath.Contains(filter))
-                    {
-                        var dad = new PointingFileTreeNode(directoryItem.Value.FullPath, directoryItem.Value);
-                        nodes.Add(dad);
-                    }
-                }
-                treeView.Nodes.AddRange(nodes.ToArray());
-            }
-            else
-            {
-                if (currentTree?.RootNodes != null)
-                {
-                    List<PointingFileTreeNode> nodes = new List<PointingFileTreeNode>();
-                    foreach (KeyValuePair<string, DirectoryTreeItem> directoryItem in currentTree.RootNodes)
-                    {
-                        var dad = new PointingFileTreeNode(directoryItem.Value.Name, directoryItem.Value);
-                        nodes.Add(dad);
-                        AddDirectoryItemChildrenToTreeView(directoryItem.Value, dad, filter, false, filterExists); // disable dynamic tree if filtering
-                    }
-
-                    // filter has been applied to files, but we need to prune empty branches now
-                    if (filterExists)
-                    {
-                        for (int iter = 0; iter < 20; iter++) // max 20 iterations
-                        {
-                            int numPruned = 0;
-                            for (int nodeIdx = 0; nodeIdx < nodes.Count; nodeIdx++)
-                            {
-                                if (nodes[nodeIdx] != null && nodes[nodeIdx] is PointingFileTreeNode pftn)
-                                {
-                                    if (pftn.Pointer == null) continue;
-                                    if (!pftn.Pointer.IsFile && pftn.Nodes.Count == 0)
-                                    {
-                                        // directories with no children need to be removed
-                                        nodes.RemoveAt(nodeIdx);
-                                        numPruned++;
-                                        nodeIdx--;
-                                    }
-                                    else
-                                    {
-                                        numPruned += PruneChildren(pftn);
-                                    }
-                                }
-                            }
-
-                            if (numPruned == 0) break; // nothing else to prune
-                        }
-                    }
-
-                    treeView.Nodes.AddRange(nodes.ToArray());
-                }
-
-                treeView.Sort();
-            }
-
-            HashSetToExpanded(treeView.Nodes, FullPathsOfNodesToExpand);
-
-            if (treeView.Nodes.Count > 0)
-            {
-                treeView.BackColor = UAGPalette.BackColor;
-            }
-            else
-            {
-                treeView.BackColor = UAGPalette.InactiveColor;
-            }
-
-            treeView.ResumeLayout();
-        }
-
-        public void UnloadContainer()
-        {
-            CurrentContainerPath = null;
-            DirectoryTreeMap[loadTreeView] = null;
-            Version = PakVersion.V4;
-            InteropType = InteropType.Pak;
-            MountPoint = "../../../";
-
-            RefreshTreeView(loadTreeView);
-            this.Text = BaseForm.DisplayVersion + " - " + CurrentContainerPath;
-            SelectedTreeView = saveTreeView;
-        }
-
-        public void LoadContainerPak(string path)
-        {
-            if (path == null) return;
-            try
-            {
-                CurrentContainerPath = path;
-                InteropType = InteropType.Pak;
-
-                string[] allFiles = Array.Empty<string>();
-                using (FileStream stream = new FileStream(CurrentContainerPath, FileMode.Open))
-                {
-                    var pakReader = new PakBuilder().Reader(stream);
-                    allFiles = pakReader.Files();
-                    Version = pakReader.GetVersion();
-                    MountPoint = pakReader.GetMountPoint();
-                }
-
-                // if the MountPoint starts with "../../../", then let's adjust all files so we can just change the MountPoint to that
-                string mpPrefix = "../../../";
-                string Prefix = "";
-                if (MountPoint.StartsWith(mpPrefix))
-                {
-                    Prefix = MountPoint.Substring(mpPrefix.Length);
-                    MountPoint = mpPrefix;
-
-                    for (int i = 0; i < allFiles.Length; i++)
-                    {
-                        allFiles[i] = Path.Combine(Prefix, allFiles[i]);
-                    }
-                }
-
-                DirectoryTreeMap[loadTreeView] = new DirectoryTree(this, allFiles, null, Prefix);
-                RefreshTreeView(loadTreeView);
-
-                this.Text = BaseForm.DisplayVersion + " - " + CurrentContainerPath;
-                SelectedTreeView = loadTreeView;
-            }
-            catch (Exception ex)
-            {
-                MessageBox.Show(string.Format(UAGConfig.GetString("Error.Generic"), ex.Message), BaseForm.DisplayVersion);
-
-                UnloadContainer();
-            }
-        }
-
-        public static readonly string ReadOnlyTempPath = Path.Combine(UAGConfig.TempFolder, "UAG_read_only");
-        public static readonly string RetocTempPath = Path.Combine(UAGConfig.TempFolder, "UAG_retoc");
-
-        public void LoadContainerUtoc(string path)
-        {
-            if (path == null) return;
-
-            bool retocAvailable = false;
-            string outputText = string.Empty; string errorText = string.Empty;
-            try
-            {
-                retocAvailable = SendCommandToRetoc($"{RetocExtraCommands} --version", out outputText, out errorText) && outputText.Contains("retoc_cli");
-            }
-            catch (Exception ex)
-            {
-                UAGUtils.InvokeUI(() =>
-                {
-                    MessageBox.Show(string.Format(UAGConfig.GetString("FileContainerForm.Error.LaunchRetoc"), ex.Message + "\n" + ex.StackTrace), BaseForm.DisplayVersion);
-                });
-                return;
-            }
-
-            if (!retocAvailable)
-            {
-                UAGUtils.InvokeUI(() =>
-                {
-                    MessageBox.Show(string.Format(UAGConfig.GetString("FileContainerForm.Error.LaunchRetoc"), outputText + "\n" + errorText), BaseForm.DisplayVersion);
-                });
-                return;
-            }
-
-            try
-            {
-                CurrentContainerPath = path;
-                InteropType = InteropType.Retoc;
-                Version = PakVersion.V11;
-                MountPoint = "../../../"; // retoc always uses this mount point
-
-                // extract file manifest
-                string tempPathForPakstore = Path.Combine(RetocTempPath, $"pakstore_{Path.GetRandomFileName()}");
-                Directory.CreateDirectory(RetocTempPath);
-                Directory.CreateDirectory(tempPathForPakstore);
-
-                string expectedManifestPath = Path.Combine(tempPathForPakstore, "pakstore.json");
-                UAGUtils.DeleteFileQuick(expectedManifestPath);
-                bool extractedManifest = FileContainerForm.SendCommandToRetoc($"{RetocExtraCommands} manifest \"{Path.GetDirectoryName(path)}\"", out _, out _, false, tempPathForPakstore);
-                RetocManifest manifestData = JsonConvert.DeserializeObject<RetocManifest>(File.ReadAllText(expectedManifestPath));
-
-                if (manifestData.OpLog.Entries == null) throw new InvalidOperationException("Failed to extract manifest");
-
-                // process manifest
-                List<string> allFilesList = new List<string>();
-                foreach (RetocOp op in manifestData.OpLog.Entries)
-                {
-                    if (op.PackageData == null) continue;
-                    foreach (RetocChunkData chunk in op.PackageData)
-                    {
-                        if (!string.IsNullOrEmpty(chunk.FileName))
-                        {
-                            // we expect the filename to always start with MountPoint, but we check anyways
-                            allFilesList.Add(chunk.FileName.StartsWith(MountPoint) ? chunk.FileName.Substring(MountPoint.Length) : chunk.FileName);
-                        }
-                    }
-                }
-
-                string[] allFiles = allFilesList.ToArray();
-                DirectoryTreeMap[loadTreeView] = new DirectoryTree(this, allFiles, null, string.Empty);
-                RefreshTreeView(loadTreeView);
-
-                this.Text = BaseForm.DisplayVersion + " - " + CurrentContainerPath;
-                SelectedTreeView = loadTreeView;
-            }
-            catch (Exception ex)
-            {
-                UAGUtils.InvokeUI(() =>
-                {
-                    MessageBox.Show(string.Format(UAGConfig.GetString("Error.Generic"), ex.Message), BaseForm.DisplayVersion);
-                });
-
-                UnloadContainer();
-            }
-        }
-
-        public void LoadContainer(string path)
-        {
-            if (path == null) return;
-
-            string ext = Path.GetExtension(path);
-            switch(ext)
-            {
-                case ".pak":
-                    LoadContainerPak(path);
-                    break;
-                case ".utoc":
-                    LoadContainerUtoc(path);
-                    break;
-                case ".ucas":
-                    LoadContainerUtoc(Path.ChangeExtension(path, ".utoc"));
-                    break;
-                default:
-                    UAGUtils.InvokeUI(() => { MessageBox.Show(string.Format(UAGConfig.GetString("FileContainerForm.Error.UnknownExtension"), ext), BaseForm.DisplayVersion); });
-                    break;
-            }
-        }
-
-        public bool SaveContainer(string path)
-        {
-            if (path == null) return false;
-            string[] stagingFiles = UAGConfig.GetStagingFiles(this.CurrentContainerPath, out string[] fixedPathsOnDisk);
-            if (stagingFiles == null || fixedPathsOnDisk == null || stagingFiles.Length != fixedPathsOnDisk.Length) return false;
-
-            switch (Path.GetExtension(path))
-            {
-                case ".pak":
-                    using (FileStream stream = new FileStream(path, FileMode.Create))
-                    {
-                        var pakWriter = new PakBuilder().Writer(stream, Version, MountPoint);
-                        for (int i = 0; i < stagingFiles.Length; i++)
-                        {
-                            string ext = Path.GetExtension(fixedPathsOnDisk[i]);
-                            if (ext == ".bak" || fixedPathsOnDisk[i].EndsWith(".bak.json")) continue;
-                            pakWriter.WriteFile(stagingFiles[i], File.ReadAllBytes(fixedPathsOnDisk[i]));
-                        }
-                        pakWriter.WriteIndex();
-                    }
-                    break;
-                case ".utoc":
-                    string engVer = ((RetocEngineVersion)BaseForm.ParsingVersion).ToString();
-                    FileContainerForm.SendCommandToRetoc($"{RetocExtraCommands} to-zen --version {engVer} \"{UAGConfig.GetStagingDirectory(path)}\" \"{path}\"", out _, out _);
-                    break;
-            }
-
-            return true;
-        }
-
-        public static bool SendCommandToRetoc(string args, out string outputText, out string errorText, bool displayConsole = false, string workingDirectory = null)
-        {
-            outputText = null;
-            errorText = null;
-
-            string libsPath = Path.Combine(UAGConfig.ConfigFolder, "Libraries");
-            string retocPath = Path.Combine(libsPath, "retoc.exe");
-            Directory.CreateDirectory(UAGConfig.ConfigFolder);
-            Directory.CreateDirectory(libsPath);
-
-            if (!HasAlreadyExtractedRetoc || !File.Exists(retocPath)) ExtractRetoc();
-
-            Process process = new Process();
-            process.StartInfo.FileName = retocPath;
-            process.StartInfo.Arguments = args;
-            process.StartInfo.WorkingDirectory = workingDirectory ?? libsPath;
-            process.StartInfo.UseShellExecute = displayConsole ? true : false;
-            process.StartInfo.RedirectStandardOutput = displayConsole ? false : true;
-            process.StartInfo.RedirectStandardError = displayConsole ? false : true;
-            process.StartInfo.CreateNoWindow = displayConsole ? false : true;
-
-            process.Start();
-
-            if (process.StartInfo.RedirectStandardOutput) outputText = process.StandardOutput.ReadToEnd().TrimEnd();
-            if (process.StartInfo.RedirectStandardError) errorText = process.StandardError.ReadToEnd().TrimEnd();
-            process.WaitForExit();
-            int errorCode = process.ExitCode;
-            process.Close();
-
-            return errorCode == 0;
-        }
-
-        private static bool HasAlreadyExtractedRetoc = false;
-        private static bool HasAlreadyExtractedRepak = false;
-        public static string ExtractRetoc()
-        {
-            HasAlreadyExtractedRetoc = true;
-            string libsPath = Path.Combine(UAGConfig.ConfigFolder, "Libraries");
-            Directory.CreateDirectory(UAGConfig.ConfigFolder);
-            Directory.CreateDirectory(libsPath);
-
-            return Program.ExtractCompressedResource($"UAssetGUI.retoc.exe.gz", Path.Combine(libsPath, "retoc.exe"));
-        }
-
-        public void ForceResize()
-        {
-            splitContainer1.Size = new Size(this.Size.Width - 28, this.Size.Height - menuStrip1.Size.Height - 50);
-            splitContainer1.Panel1.Size = new Size(splitContainer1.SplitterDistance, splitContainer1.Size.Height);
-            splitContainer1.Panel2.Size = new Size(splitContainer1.Size.Width - splitContainer1.SplitterDistance, splitContainer1.Size.Height);
-            loadButton.Location = new Point((splitContainer1.Panel1.Size.Width - loadButton.Size.Width) / 2, loadButton.Location.Y);
-            saveButton.Location = new Point((splitContainer1.Panel2.Size.Width - saveButton.Size.Width) / 2, saveButton.Location.Y);
-            loadTreeView.Location = new Point(0, loadButton.Location.Y + loadButton.Size.Height + 6);
-            loadTreeView.Size = new Size(splitContainer1.Panel1.Size.Width, splitContainer1.Panel1.Size.Height - loadTreeView.Location.Y);
-            saveTreeView.Location = new Point(0, saveButton.Location.Y + saveButton.Size.Height + 6);
-            saveTreeView.Size = new Size(splitContainer1.Panel2.Size.Width, splitContainer1.Panel2.Size.Height - saveTreeView.Location.Y);
-        }
-
-        private void FileContainerForm_SizeChanged(object sender, EventArgs e)
-        {
-            ForceResize();
-        }
-
-        private void splitContainer1_SplitterMoved(object sender, SplitterEventArgs e)
-        {
-            ForceResize();
-        }
-
-        private void FileContainerForm_Shown(object sender, EventArgs e)
-        {
-            splitContainer1.SplitterDistance = (this.Size.Width - 28) / 2;
-            ForceResize();
-        }
-
-        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
-        {
-            switch (keyData)
-            {
-                case Keys.Control | Keys.X:
-                    cutToolStripMenuItem.PerformClick();
-                    return true;
-                case Keys.Control | Keys.C:
-                    copyToolStripMenuItem.PerformClick();
-                    return true;
-                case Keys.Control | Keys.V:
-                    pasteToolStripMenuItem.PerformClick();
-                    return true;
-                case Keys.Delete:
-                    deleteToolStripMenuItem.PerformClick();
-                    return true;
-            }
-
-            return base.ProcessCmdKey(ref msg, keyData);
-        }
-
-        private void expandAllToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            this.SelectedTreeView?.ExpandAll();
-        }
-
-        private void collapseAllToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            this.SelectedTreeView?.CollapseAll();
-        }
-
-        private void refreshToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            RefreshTreeView(loadTreeView);
-            RefreshTreeView(saveTreeView);
-        }
-
-        private void loadButton_Click(object sender, EventArgs e)
-        {
-            loadToolStripMenuItem.PerformClick();
-        }
-
-        private void saveButton_Click(object sender, EventArgs e)
-        {
-            saveToolStripMenuItem.PerformClick();
-        }
-
-        private void treeView_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
-        {
-            if (e?.Node != null && e.Node is PointingFileTreeNode pftNode)
-            {
-                if (pftNode.Pointer.IsFile) pftNode.Pointer.OpenFile();
-            }
-        }
-
-        private DirectoryTreeItem copiedPftNode = null;
-        private bool shouldDeleteCopiedPftNode = false;
-        private void copyToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            if (this.SelectedTreeView?.SelectedNode is PointingFileTreeNode pftNode)
-            {
-                if (pftNode == null) return;
-
-                copiedPftNode = pftNode.Pointer;
-                shouldDeleteCopiedPftNode = false;
-            }
-        }
-
-        private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            if (this.SelectedTreeView?.SelectedNode is PointingFileTreeNode pftNode)
-            {
-                if (copiedPftNode == null || pftNode == null) return;
-                DirectoryTreeItem clipboardNode = copiedPftNode;
-
-                if (string.IsNullOrEmpty(pftNode.Pointer.FixedPathOnDisk)) return; // only allow pasting into staging
-                DirectoryTreeItem targetDirectory = pftNode.Pointer;
-                if (targetDirectory.IsFile) targetDirectory = targetDirectory.Parent;
-
-                string desiredStagingPath = Path.Combine(targetDirectory?.FullPath ?? string.Empty, clipboardNode.Name);
-                clipboardNode.StageFile(desiredStagingPath);
-
-                if (shouldDeleteCopiedPftNode)
-                {
-                    clipboardNode.DeleteFile();
-                    shouldDeleteCopiedPftNode = false;
-                }
-            }
-        }
-
-        private void deleteToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            if (this.SelectedTreeView?.SelectedNode is PointingFileTreeNode pftNode)
-            {
-                if (pftNode == null) return;
-                if (string.IsNullOrEmpty(pftNode.Pointer.FixedPathOnDisk)) return; // only allow deleting from staging
-
-                pftNode.Pointer.DeleteFile();
-            }
-        }
-
-        private void cutToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            if (this.SelectedTreeView?.SelectedNode is PointingFileTreeNode pftNode)
-            {
-                if (pftNode == null) return;
-                if (string.IsNullOrEmpty(pftNode.Pointer.FixedPathOnDisk)) return; // only allow cutting from staging
-
-                copiedPftNode = pftNode.Pointer;
-                shouldDeleteCopiedPftNode = true;
-            }
-        }
-
-        private void event_DragEnter(object sender, DragEventArgs e)
-        {
-            if (e.Data.GetDataPresent(DataFormats.FileDrop)) e.Effect = DragDropEffects.Copy;
-        }
-
-        private void loadTreeView_DragDrop(object sender, DragEventArgs e)
-        {
-            string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
-            if (files.Length > 0) LoadContainer(files[0]);
-        }
-
-        private void saveTreeView_DragDrop(object sender, DragEventArgs e)
-        {
-            string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
-            if (files.Length > 0)
-            {
-                UAGConfig.StageFile(files[0], CurrentContainerPath);
-                this.RefreshTreeView(this.saveTreeView);
-            }
-        }
-
-        private void loadTreeView_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
-        {
-            saveTreeView.SelectedNode = null;
-            this.SelectedTreeView = loadTreeView;
-        }
-
-        private void saveTreeView_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
-        {
-            loadTreeView.SelectedNode = null;
-            this.SelectedTreeView = saveTreeView;
-        }
-
-        private void loadToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            using (System.Windows.Forms.OpenFileDialog openFileDialog = new System.Windows.Forms.OpenFileDialog())
-            {
-                openFileDialog.Filter = "Unreal Engine Container Files (*.pak, *.utoc)|*.pak;*.utoc|All files (*.*)|*.*";
-                openFileDialog.FilterIndex = 1;
-                openFileDialog.RestoreDirectory = true;
-
-                if (openFileDialog.ShowDialog() == DialogResult.OK)
-                {
-                    LoadContainer(openFileDialog.FileName);
-                }
-            }
-        }
-
-        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            using (System.Windows.Forms.SaveFileDialog dialog = new System.Windows.Forms.SaveFileDialog())
-            {
-                dialog.Filter = ".pak Container Files (*.pak)|*.pak|.utoc Container Files (*.utoc)|*.utoc|All files (*.*)|*.*";
-                dialog.FilterIndex = 1;
-                dialog.RestoreDirectory = true;
-
-                DialogResult res = dialog.ShowDialog();
-                if (res == DialogResult.OK)
-                {
-                    bool success = SaveContainer(dialog.FileName);
-                    if (!success) MessageBox.Show(string.Format(UAGConfig.GetString("Error.FailedToSave"), string.Empty), BaseForm.DisplayVersion);
-                }
-                else if (res != DialogResult.Cancel)
-                {
-                    MessageBox.Show(string.Format(UAGConfig.GetString("Error.FailedToSave"), string.Empty), BaseForm.DisplayVersion);
-                }
-            }
-        }
-
-        private void stageFromDiskToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            using (System.Windows.Forms.OpenFileDialog openFileDialog = new System.Windows.Forms.OpenFileDialog())
-            {
-                openFileDialog.Filter = "All files (*.*)|*.*";
-                openFileDialog.FilterIndex = 1;
-                openFileDialog.RestoreDirectory = true;
-
-                if (openFileDialog.ShowDialog() == DialogResult.OK)
-                {
-                    UAGConfig.StageFile(openFileDialog.FileName, CurrentContainerPath);
-                    this.RefreshTreeView(this.saveTreeView);
-                }
-            }
-        }
-
-        private void stageFromDiskToPathToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            using (System.Windows.Forms.OpenFileDialog openFileDialog = new System.Windows.Forms.OpenFileDialog())
-            {
-                openFileDialog.Filter = "All files (*.*)|*.*";
-                openFileDialog.FilterIndex = 1;
-                openFileDialog.RestoreDirectory = true;
-
-                if (openFileDialog.ShowDialog() == DialogResult.OK)
-                {
-                    TextPrompt replacementPrompt = new TextPrompt()
-                    {
-                        DisplayText = UAGConfig.GetString("FileContainerForm.Prompt.StageToPath"),
-                        Text = this.Text
-                    };
-
-                    replacementPrompt.StartPosition = FormStartPosition.CenterParent;
-                    replacementPrompt.PrefilledText = Path.GetFileName(openFileDialog.FileName) ?? string.Empty;
-
-                    string newFileName = null;
-                    if (replacementPrompt.ShowDialog(ParentForm) == DialogResult.OK)
-                    {
-                        newFileName = string.Join("_", replacementPrompt.OutputText.Replace('\\', '/').Split(Path.GetInvalidPathChars(), StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.');
-                    }
-
-                    replacementPrompt.Dispose();
-
-                    if (newFileName != null)
-                    {
-                        UAGConfig.StageFile(openFileDialog.FileName, CurrentContainerPath, newFileName);
-                        this.RefreshTreeView(this.saveTreeView);
-                    }
-                }
-            }
-        }
-
-        private void InitializeChildren(PointingFileTreeNode ptn)
-        {
-            if (!ptn.ChildrenInitialized)
-            {
-                ptn.Nodes.Clear();
-                if (!Filter.ContainsKey(ptn.TreeView)) Filter[ptn.TreeView] = null;
-                AddDirectoryItemChildrenToTreeView(ptn.Pointer, ptn, Filter[ptn.TreeView], true);
-            }
-        }
-
-        private void treeView_BeforeExpand(object sender, TreeViewCancelEventArgs e)
-        {
-            if (e.Node is PointingFileTreeNode ptn) InitializeChildren(ptn);
-        }
-
-        private void ExtractVisit(DirectoryTreeItem processingNode, ProgressBarForm progressBarForm, FileStream stream2 = null, PakReader reader2 = null)
-        {
-            if (processingNode.IsFile)
-            {
-                UAGConfig.ExtractFile(processingNode, this.InteropType, stream2, reader2);
-                extractAllBackgroundWorker.ReportProgress(0); // the percentage we pass in is unused
-                return;
-            }
-
-            foreach (var entry in processingNode.Children)
-            {
-                if (extractAllBackgroundWorker.CancellationPending) break;
-                ExtractVisit(entry.Value, progressBarForm, stream2, reader2);
-            }
-        }
-
-        private ProgressBarForm progressBarForm;
-        private void extractAllToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            if (!DirectoryTreeMap.TryGetValue(loadTreeView, out DirectoryTree loadedTree) || loadedTree == null)
-            {
-                MessageBox.Show(UAGConfig.GetString("FileContainerForm.Prompt.ExtractNoContainer"), BaseForm.DisplayVersion);
-                return;
-            }
-
-            switch(InteropType)
-            {
-                case InteropType.Pak:
-                    if (extractAllBackgroundWorker.IsBusy) return;
-
-                    int numFiles = loadedTree.GetNumFiles();
-
-                    UAGUtils.InvokeUI(() =>
-                    {
-                        progressBarForm = new ProgressBarForm();
-                        progressBarForm.Value = 0;
-                        progressBarForm.Maximum = numFiles;
-                        progressBarForm.Text = this.Text;
-                        progressBarForm.BaseForm = this;
-                        progressBarForm.Show(this);
-                    });
-
-                    extractAllBackgroundWorker.RunWorkerAsync();
-                    break;
-                case InteropType.Retoc:
-                    if (extractAllBackgroundWorker.IsBusy) return;
-                    extractAllBackgroundWorker.RunWorkerAsync();
-                    break;
-                default:
-                    MessageBox.Show($"This operation is not supported for the current interop type ({InteropType.ToString()}).", BaseForm.DisplayVersion);
-                    break;
-            }
-        }
-
-        private void extractAllBackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
-        {
-            Directory.CreateDirectory(UAGConfig.ExtractedFolder);
-
-            switch (InteropType)
-            {
-                case InteropType.Pak:
-                    if (!DirectoryTreeMap.TryGetValue(loadTreeView, out DirectoryTree loadedTree) || loadedTree == null) throw new InvalidOperationException("No container loaded");
-
-                    using (FileStream stream = new FileStream(this.CurrentContainerPath, FileMode.Open))
-                    {
-                        var reader = new PakBuilder().Reader(stream);
-                        foreach (var entry in loadedTree.RootNodes)
-                        {
-                            if (extractAllBackgroundWorker.CancellationPending) break;
-                            ExtractVisit(entry.Value, progressBarForm, stream, reader);
-                        }
-                    }
-
-                    if (extractAllBackgroundWorker.CancellationPending)
-                    {
-                        e.Cancel = true;
-                        return;
-                    }
-                    UAGUtils.OpenDirectory(UAGConfig.ExtractedFolder);
-                    break;
-                case InteropType.Retoc:
-                    FileContainerForm.SendCommandToRetoc($"{RetocExtraCommands} to-legacy \"{Path.GetDirectoryName(CurrentContainerPath)}\" \"{UAGConfig.ExtractedFolder}\"", out _, out _, true);
-                    UAGUtils.OpenDirectory(UAGConfig.ExtractedFolder);
-                    break;
-            }
-        }
-
-        private void extractAllBackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
-        {
-            UAGUtils.InvokeUI(() => progressBarForm.Progress(1));
-        }
-
-        private void extractAllBackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
-        {
-            UAGUtils.InvokeUI(() =>
-            {
-                if (e.Cancelled)
-                {
-                    MessageBox.Show(UAGConfig.GetString("Generic.Prompt.OperationCanceled"), BaseForm.DisplayVersion);
-                }
-                else if (e.Error != null)
-                {
-                    MessageBox.Show(string.Format(UAGConfig.GetString("FileContainerForm.Prompt.ExtractError"), e.Error.Message), BaseForm.DisplayVersion);
-                }
-                else
-                {
-                    MessageBox.Show(progressBarForm == null ? UAGConfig.GetString("Generic.Prompt.OperationCompleted") : string.Format(UAGConfig.GetString("FileContainerForm.Prompt.ExtractDoneCount"), progressBarForm.Value), BaseForm.DisplayVersion);
-                }
-                progressBarForm?.Close();
-            });
-        }
-
-        private void toggleFlatViewToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            if (SelectedTreeView == null || FlatViewEnabled == null) return;
-            if (!FlatViewEnabled.ContainsKey(SelectedTreeView)) FlatViewEnabled[SelectedTreeView] = false;
-            FlatViewEnabled[SelectedTreeView] = !FlatViewEnabled[SelectedTreeView];
-            RefreshTreeView(SelectedTreeView);
-        }
-
-        private void applyFilterToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            UAGUtils.InvokeUI(() =>
-            {
-                TextPrompt replacementPrompt = new TextPrompt()
-                {
-                    DisplayText = UAGConfig.GetString("FileContainerForm.Prompt.ApplyFilter"),
-                    Text = this.Text,
-                    AllowEmptyText = true
-                };
-
-                replacementPrompt.StartPosition = FormStartPosition.CenterParent;
-                replacementPrompt.PrefilledText = string.Empty;
-
-                string filter = null;
-                if (replacementPrompt.ShowDialog(ParentForm) == DialogResult.OK)
-                {
-                    filter = replacementPrompt.OutputText;
-                }
-
-                replacementPrompt.Dispose();
-
-                if (filter != null && loadTreeView != null && this.Filter != null)
-                {
-                    this.Filter[loadTreeView] = filter;
-                    RefreshTreeView(loadTreeView);
-                }
-            });
-        }
-
-        private void setRetocCommandLineParametersToolStripMenuItem_Click(object sender, EventArgs e)
-        {
-            UAGUtils.InvokeUI(() =>
-            {
-                TextPrompt replacementPrompt = new TextPrompt()
-                {
-                    DisplayText = UAGConfig.GetString("FileContainerForm.Prompt.SetExtraRetocParameters"),
-                    Text = this.Text,
-                    AllowEmptyText = true
-                };
-
-                replacementPrompt.StartPosition = FormStartPosition.CenterParent;
-                replacementPrompt.PrefilledText = RetocExtraCommands;
-
-                if (replacementPrompt.ShowDialog(ParentForm) == DialogResult.OK)
-                {
-                    RetocExtraCommands = replacementPrompt.OutputText;
-                }
-
-                replacementPrompt.Dispose();
-            });
-        }
-    }
-
-    public class PointingFileTreeNode : TreeNode
-    {
-        public DirectoryTreeItem Pointer;
-        public bool ChildrenInitialized = false;
-
-        public PointingFileTreeNode(string text, DirectoryTreeItem item) : base(text)
-        {
-            Pointer = item;
-            //NodeFont = new Font(new FontFamily("Microsoft Sans Serif"), 8.25f);
-
-            this.ContextMenuStrip = new ContextMenuStrip();
-            ToolStripMenuItem tsmItem = null;
-
-            if (Pointer.IsFile)
-            {
-                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.Open"));
-                tsmItem.Click += (sender, args) => Pointer.OpenFile();
-                this.ContextMenuStrip.Items.Add(tsmItem);
-            }
-
-            if (Pointer.FixedPathOnDisk == null)
-            {
-                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.Extract"));
-                tsmItem.Click += (sender, args) =>
-                {
-                    string outPath = UAGConfig.ExtractFile(Pointer, item.ParentForm.InteropType);
-                    if (outPath == null) return;
-                    if ((Path.GetExtension(outPath)?.Length ?? 0) > 0) outPath = Path.GetDirectoryName(outPath);
-                    UAGUtils.OpenDirectory(outPath);
-                };
-                this.ContextMenuStrip.Items.Add(tsmItem);
-                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.Stage"));
-                tsmItem.Click += (sender, args) => Pointer.StageFile();
-                this.ContextMenuStrip.Items.Add(tsmItem);
-                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.StageToPath"));
-                tsmItem.Click += (sender, args) => Pointer.StageFileToPath();
-                this.ContextMenuStrip.Items.Add(tsmItem);
-            }
-
-            if (Pointer.FixedPathOnDisk != null)
-            {
-                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.Delete"));
-                tsmItem.Click += (sender, args) => Pointer.DeleteFile();
-                this.ContextMenuStrip.Items.Add(tsmItem);
-            }
-        }
-    }
-
-    public class DirectoryTree
-    {
-        public FileContainerForm ParentForm;
-        public IDictionary<string, DirectoryTreeItem> RootNodes;
-        public IDictionary<string, DirectoryTreeItem> RootNodesFlat;
-        public IDictionary<string, DirectoryTreeItem> PackagePathToNode;
-
-        public DirectoryTree(FileContainerForm parentForm)
-        {
-            RootNodes = new Dictionary<string, DirectoryTreeItem>();
-            RootNodesFlat = new Dictionary<string, DirectoryTreeItem>();
-            PackagePathToNode = new Dictionary<string, DirectoryTreeItem>();
-            ParentForm = parentForm;
-        }
-
-        public DirectoryTree(FileContainerForm parentForm, string[] paths, string[] fixedAssetsOnDisk = null, string prefix = null)
-        {
-            RootNodes = new Dictionary<string, DirectoryTreeItem>();
-            RootNodesFlat = new Dictionary<string, DirectoryTreeItem>();
-            PackagePathToNode = new Dictionary<string, DirectoryTreeItem>();
-            ParentForm = parentForm;
-
-            if (fixedAssetsOnDisk != null && fixedAssetsOnDisk.Length == paths.Length)
-            {
-                for (int i = 0; i < paths.Length; i++) this.CreateNode(paths[i], fixedAssetsOnDisk[i], prefix);
-            }
-            else
-            {
-                for (int i = 0; i < paths.Length; i++) this.CreateNode(paths[i], null, prefix);
-            }
-        }
-
-        private static int GetNumFilesVisit(DirectoryTreeItem item)
-        {
-            if (item.IsFile) return 1;
-
-            int numFiles = 0; // to count directories too, set to 1
-            foreach (var entry in item.Children) numFiles += GetNumFilesVisit(entry.Value);
-            return numFiles;
-        }
-
-        public int GetNumFiles()
-        {
-            int numFiles = 0;
-            foreach (var entry in RootNodes) numFiles += GetNumFilesVisit(entry.Value);
-            return numFiles;
-        }
-
-        public DirectoryTreeItem GetRootNode(string component)
-        {
-            if (RootNodes.TryGetValue(component, out var node)) return node;
-            return null;
-        }
-
-        public DirectoryTreeItem GetNode(string path)
-        {
-            string[] pathComponents = path.Split('/');
-            if (pathComponents.Length == 0) return null;
-            if (!RootNodes.ContainsKey(pathComponents[0])) return null;
-
-            DirectoryTreeItem currentItem = RootNodes[pathComponents[0]];
-            for (int i = 1; i < pathComponents.Length; i++)
-            {
-                currentItem = currentItem.Children[pathComponents[i]];
-            }
-            return currentItem;
-        }
-
-        private static readonly Regex ProjectWithContentPrefixRegex = new Regex(@"^\/?[^\s\/]+\/Content", RegexOptions.Compiled);
-
-        public DirectoryTreeItem CreateNode(string path, string fixedAssetOnDisk = null, string prefix = null)
-        {
-            string[] pathComponents = path.Split('/');
-            if (pathComponents.Length == 0) return null;
-
-            string[] fixedAssetOnDiskComponents = fixedAssetOnDisk?.Split(Path.DirectorySeparatorChar) ?? Array.Empty<string>();
-            string startingFixedAssetOnDisk = string.Empty;
-            if (fixedAssetOnDiskComponents.Length > pathComponents.Length)
-            {
-                string[] fixedAssetOnDiskComponentsNuevo = new string[fixedAssetOnDiskComponents.Length - pathComponents.Length];
-                Array.Copy(fixedAssetOnDiskComponents, fixedAssetOnDiskComponentsNuevo, fixedAssetOnDiskComponentsNuevo.Length);
-                startingFixedAssetOnDisk = string.Join(Path.DirectorySeparatorChar, fixedAssetOnDiskComponentsNuevo);
-            }
-
-            if (!RootNodes.ContainsKey(pathComponents[0]))
-            {
-                string ext = Path.GetExtension(pathComponents[0]);
-                if (ext.Length > 1 && (ext == ".uexp" || ext == ".ubulk" || ext == ".bak")) return null;
-
-                RootNodes[pathComponents[0]] = new DirectoryTreeItem(ParentForm, pathComponents[0], pathComponents[0], ext.Length > 1, prefix);
-            }
-
-            DirectoryTreeItem currentItem = RootNodes[pathComponents[0]];
-            if (startingFixedAssetOnDisk.Length > 0)
-            {
-                startingFixedAssetOnDisk = Path.Combine(startingFixedAssetOnDisk, pathComponents[0]);
-                currentItem.FixedPathOnDisk = startingFixedAssetOnDisk;
-            }
-
-            for (int i = 1; i < pathComponents.Length; i++)
-            {
-                string ext = Path.GetExtension(pathComponents[i]);
-                if (ext.Length > 1 && (ext == ".uexp" || ext == ".ubulk" || ext == ".bak" || pathComponents[i].EndsWith(".bak.json"))) return null;
-
-                if (!currentItem.Children.ContainsKey(pathComponents[i]))
-                {
-                    currentItem.Children[pathComponents[i]] = new DirectoryTreeItem(ParentForm, pathComponents[i], currentItem.FullPath + "/" + pathComponents[i], ext.Length > 1, prefix);
-                    currentItem.Children[pathComponents[i]].Parent = currentItem;
-                }
-                currentItem = currentItem.Children[pathComponents[i]];
-
-                if (startingFixedAssetOnDisk.Length > 0)
-                {
-                    startingFixedAssetOnDisk = Path.Combine(startingFixedAssetOnDisk, pathComponents[i]);
-                    currentItem.FixedPathOnDisk = startingFixedAssetOnDisk;
-                }
-            }
-
-            RootNodesFlat[currentItem.FullPath.Replace('\\', '/').Replace(Path.DirectorySeparatorChar, '/')] = currentItem;
-
-            // todo, this algorithm needs to be fixed for plugins
-            // Engine/Plugins/Animation/ControlRig/Content/Controls/ControlRigGizmoMaterial.uasset => /ControlRig/Controls/ControlRigGizmoMaterial
-            string packageName = Path.ChangeExtension(currentItem.FullPath, null).Replace('\\', '/').Replace(Path.DirectorySeparatorChar, '/').Replace("Engine/Content/", "Engine/");
-            packageName = ProjectWithContentPrefixRegex.Replace(packageName, "/Game", 1);
-            if (!packageName.StartsWith('/')) packageName = '/' + packageName;
-            PackagePathToNode[packageName] = currentItem;
-
-            return currentItem;
-        }
-    }
-
-    public class DirectoryTreeItem
-    {
-        public FileContainerForm ParentForm;
-        public string Name;
-        public string FullPath;
-        public string FixedPathOnDisk;
-        public string Prefix;
-        public bool IsFile = false;
-        public DirectoryTreeItem Parent;
-        public IDictionary<string, DirectoryTreeItem> Children;
-
-        public string SaveFileToTemp(InteropType interopType, string outputPathDirectory = null, FileStream stream2 = null, PakReader reader2 = null)
-        {
-            outputPathDirectory = outputPathDirectory ?? Path.Combine(FileContainerForm.ReadOnlyTempPath, Path.GetFileNameWithoutExtension(ParentForm.CurrentContainerPath));
-            
-            string outputPath1 = Path.Combine(outputPathDirectory, FullPath.Replace('/', Path.DirectorySeparatorChar));
-            string outputPath2 = Path.Combine(outputPathDirectory, Path.ChangeExtension(FullPath, ".uexp").Replace('/', Path.DirectorySeparatorChar));
-            string outputPath3 = Path.Combine(outputPathDirectory, Path.ChangeExtension(FullPath, ".ubulk").Replace('/', Path.DirectorySeparatorChar));
-            Directory.CreateDirectory(Path.GetDirectoryName(outputPath1)); // same directory as outputPath2, no need to create that one too
-
-            if (FixedPathOnDisk != null)
-            {
-                File.Copy(FixedPathOnDisk, outputPath1, true);
-                try { File.Copy(Path.ChangeExtension(FixedPathOnDisk, ".uexp"), outputPath2, true); } catch { }
-                try { File.Copy(Path.ChangeExtension(FixedPathOnDisk, ".ubulk"), outputPath3, true); } catch { }
-                return outputPath1;
-            }
-
-            switch(interopType)
-            {
-                case InteropType.Pak:
-                    {
-                        if (reader2 == null || stream2 == null)
-                        {
-                            using (FileStream stream = new FileStream(ParentForm.CurrentContainerPath, FileMode.Open))
-                            {
-                                var reader = new PakBuilder().Reader(stream);
-
-                                byte[] res = reader.Get(stream, FullPath.Substring(Prefix?.Length ?? 0));
-                                if (res != null)
-                                {
-                                    UAGUtils.DeleteFileQuick(outputPath1);
-                                    File.WriteAllBytes(outputPath1, res);
-                                }
-                                else
-                                {
-                                    return null;
-                                }
-
-                                res = reader.Get(stream, Path.ChangeExtension(FullPath.Substring(Prefix?.Length ?? 0), ".uexp"));
-                                UAGUtils.DeleteFileQuick(outputPath2);
-                                if (res != null) File.WriteAllBytes(outputPath2, res);
-
-                                res = reader.Get(stream, Path.ChangeExtension(FullPath.Substring(Prefix?.Length ?? 0), ".ubulk"));
-                                UAGUtils.DeleteFileQuick(outputPath3);
-                                if (res != null) File.WriteAllBytes(outputPath3, res);
-                            }
-                        }
-                        else
-                        {
-                            byte[] res = reader2.Get(stream2, FullPath.Substring(Prefix?.Length ?? 0));
-                            if (res != null)
-                            {
-                                File.WriteAllBytes(outputPath1, res);
-                            }
-                            else
-                            {
-                                return null;
-                            }
-
-                            res = reader2.Get(stream2, Path.ChangeExtension(FullPath.Substring(Prefix?.Length ?? 0), ".uexp"));
-                            if (res != null) File.WriteAllBytes(outputPath2, res);
-                            res = reader2.Get(stream2, Path.ChangeExtension(FullPath.Substring(Prefix?.Length ?? 0), ".ubulk"));
-                            if (res != null) File.WriteAllBytes(outputPath3, res);
-                        }
-                    }
-                    break;
-                case InteropType.Retoc:
-                    string targetPath = FullPath.Substring(Prefix?.Length ?? 0);
-                    string origPathPrefix = Path.Combine(FileContainerForm.RetocTempPath, "RetocFiles");
-                    bool retocSuccess = FileContainerForm.SendCommandToRetoc($"{FileContainerForm.RetocExtraCommands ?? string.Empty} to-legacy --filter \"{targetPath}\" \"{Path.GetDirectoryName(ParentForm.CurrentContainerPath)}\" \"{origPathPrefix}\"", out _, out _);
-                    if (!retocSuccess) return null;
-
-                    string origPath1 = Path.Combine(origPathPrefix, targetPath);
-                    UAGUtils.MoveFileQuick(Path.ChangeExtension(origPath1, "uasset"), outputPath1, true);
-                    UAGUtils.MoveFileQuick(Path.ChangeExtension(origPath1, "umap"), outputPath1, true);
-                    UAGUtils.MoveFileQuick(Path.ChangeExtension(origPath1, "uexp"), outputPath2, true);
-                    UAGUtils.MoveFileQuick(Path.ChangeExtension(origPath1, "ubulk"), outputPath3, true);
-                    break;
-            }
-
-            return outputPath1;
-        }
-
-        public void OpenFile()
-        {
-            string outputPath = FixedPathOnDisk != null ? FixedPathOnDisk : this.SaveFileToTemp(this.ParentForm.InteropType);
-            if (outputPath == null)
-            {
-                MessageBox.Show(string.Format(UAGConfig.GetString("Error.Generic"), string.Empty), this.ParentForm.BaseForm.DisplayVersion);
-                return;
-            }
-
-            string ext = Path.GetExtension(outputPath);
-            if (ext == ".uasset" || ext == ".umap")
-            {
-                this.ParentForm.BaseForm.LoadFileAt(outputPath, this.ParentForm);
-                this.ParentForm.BaseForm.Focus();
-            }
-            else
-            {
-                new Process
-                {
-                    StartInfo = new ProcessStartInfo(outputPath) { UseShellExecute = true }
-                }.Start(); // open externally
-            }
-        }
-
-        public void StageFile(string newPath = null)
-        {
-            if (newPath == null) newPath = this.FullPath;
-
-            UAGConfig.StageFile(this, this.ParentForm.InteropType, newPath);
-            this.ParentForm.RefreshTreeView(this.ParentForm.saveTreeView);
-
-            var generatedNode = this.ParentForm.GetSpecificNode(this.ParentForm.saveTreeView, newPath);
-            if (generatedNode == null) return;
-            generatedNode.EnsureVisible();
-            this.ParentForm.saveTreeView.SelectedNode = generatedNode;
-        }
-
-        public void StageFileToPath()
-        {
-            UAGUtils.InvokeUI(() =>
-            {
-                TextPrompt replacementPrompt = new TextPrompt()
-                {
-                    DisplayText = "What path should this object be staged to?"
-                };
-
-                replacementPrompt.StartPosition = FormStartPosition.CenterParent;
-                replacementPrompt.PrefilledText = this.FullPath ?? string.Empty;
-
-                string newFileName = null;
-                if (replacementPrompt.ShowDialog(ParentForm) == DialogResult.OK)
-                {
-                    newFileName = string.Join("_", replacementPrompt.OutputText.Replace('\\', '/').Split(Path.GetInvalidPathChars(), StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.');
-                }
-
-                replacementPrompt.Dispose();
-
-                if (newFileName != null)
-                {
-                    this.StageFile(newFileName);
-                }
-            });
-        }
-
-        public void DeleteFile()
-        {
-            if (FixedPathOnDisk == null) return;
-
-            bool success = UAGUtils.DeleteFileQuick(FixedPathOnDisk);
-            UAGUtils.DeleteFileQuick(Path.ChangeExtension(FixedPathOnDisk, ".uexp"));
-            UAGUtils.DeleteFileQuick(Path.ChangeExtension(FixedPathOnDisk, ".ubulk"));
-            
-            if (!success)
-            {
-                UAGUtils.DeleteDirectoryQuick(FixedPathOnDisk, true);
-            }
-
-            FixedPathOnDisk = null;
-            this.ParentForm.RefreshTreeView(this.ParentForm.saveTreeView);
-        }
-
-        public DirectoryTreeItem(FileContainerForm parentForm, string name, string fullPath, bool isFile, string prefix)
-        {
-            ParentForm = parentForm;
-            FullPath = fullPath;
-            Name = Path.GetFileName(name);
-            IsFile = isFile;
-            Prefix = prefix;
-            Children = new Dictionary<string, DirectoryTreeItem>();
-        }
-
-        public DirectoryTreeItem(FileContainerForm parentForm)
-        {
-            ParentForm = parentForm;
-            Children = new Dictionary<string, DirectoryTreeItem>();
-        }
-    }
-}
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text.RegularExpressions;
+using System.Windows.Forms;
+using UAssetAPI;
+using UAssetAPI.UnrealTypes;
+
+namespace UAssetGUI
+{
+    public enum InteropType
+    {
+        Pak,
+        Retoc
+    }
+
+    public enum RetocEngineVersion
+    {
+        UE4_25 = EngineVersion.VER_UE4_25,
+        UE4_26 = EngineVersion.VER_UE4_26,
+        UE4_27 = EngineVersion.VER_UE4_27,
+        UE5_0 = EngineVersion.VER_UE5_0,
+        UE5_1 = EngineVersion.VER_UE5_1,
+        UE5_2 = EngineVersion.VER_UE5_2,
+        UE5_3 = EngineVersion.VER_UE5_3,
+        UE5_4 = EngineVersion.VER_UE5_4,
+        UE5_5 = EngineVersion.VER_UE5_5,
+        UE5_6 = EngineVersion.VER_UE5_6,
+        UE5_7 = EngineVersion.VER_UE5_7,
+        UE5_8 = EngineVersion.VER_UE5_8,
+    }
+
+    public struct RetocManifest
+    {
+        [JsonProperty("oplog")]
+        public RetocOpLog OpLog;
+    }
+
+    public struct RetocOpLog
+    {
+        [JsonProperty("entries")]
+        public List<RetocOp> Entries;
+    }
+
+    public struct RetocOp
+    {
+        [JsonProperty("packagestoreentry")]
+        public RetocPackageStoreEntry PackageStoreEntry;
+        [JsonProperty("packagedata")]
+        public List<RetocChunkData> PackageData;
+        [JsonProperty("bulkdata")]
+        public List<RetocChunkData> BulkData;
+    }
+
+    public struct RetocPackageStoreEntry
+    {
+        [JsonProperty("packagename")]
+        public string PackageName;
+    }
+
+    public struct RetocChunkData
+    {
+        [JsonProperty("id")]
+        public string ID;
+        [JsonProperty("filename")]
+        public string FileName;
+    }
+
+    public partial class FileContainerForm : Form, ILocalizable
+    {
+        public IDictionary<TreeView, DirectoryTree> DirectoryTreeMap = new Dictionary<TreeView, DirectoryTree>();
+        public string CurrentContainerPath;
+        public IDictionary<TreeView, bool> FlatViewEnabled = new Dictionary<TreeView, bool>();
+        public IDictionary<TreeView, string> Filter = new Dictionary<TreeView, string>();
+        public PakVersion Version = PakVersion.V4;
+        public InteropType InteropType = InteropType.Pak;
+        public string MountPoint = "../../../";
+        public static string RetocExtraCommands
+        {
+            get { return UAGConfig.Data.RetocExtraCommands; }
+            set { UAGConfig.Data.RetocExtraCommands = value; UAGConfig.Save(); }
+        }
+
+        public FileContainerForm()
+        {
+            InitializeComponent();
+        }
+
+        public Form1 BaseForm;
+        public TreeView SelectedTreeView;
+        private void FileContainerForm_Load(object sender, EventArgs e)
+        {
+            this.Text = BaseForm.DisplayVersion;
+
+            UAGPalette.RefreshTheme(this);
+            this.AdjustFormPosition(BaseForm);
+
+            this.cutToolStripMenuItem.ShortcutKeyDisplayString = UAGUtils.ShortcutToText(Keys.Control | Keys.X);
+            this.copyToolStripMenuItem.ShortcutKeyDisplayString = UAGUtils.ShortcutToText(Keys.Control | Keys.C);
+            this.pasteToolStripMenuItem.ShortcutKeyDisplayString = UAGUtils.ShortcutToText(Keys.Control | Keys.V);
+            this.deleteToolStripMenuItem.ShortcutKeyDisplayString = UAGUtils.ShortcutToText(Keys.Delete);
+
+            this.loadTreeView.AllowDrop = true;
+            this.loadTreeView.DragEnter += new DragEventHandler(event_DragEnter);
+            this.loadTreeView.DragDrop += new DragEventHandler(loadTreeView_DragDrop);
+            this.saveTreeView.AllowDrop = true;
+            this.saveTreeView.DragEnter += new DragEventHandler(event_DragEnter);
+            this.saveTreeView.DragDrop += new DragEventHandler(saveTreeView_DragDrop);
+
+            menuStrip1.Renderer = new UAGMenuStripRenderer();
+            foreach (ToolStripMenuItem entry in menuStrip1.Items)
+            {
+                entry.DropDownOpened += (sender, args) =>
+                {
+                    isDropDownOpened[entry] = true;
+                };
+                entry.DropDownClosed += (sender, args) =>
+                {
+                    isDropDownOpened[entry] = false;
+                };
+            }
+
+            // extract repak_bind.dll if available
+            string libsPath = Path.Combine(UAGConfig.ConfigFolder, "Libraries");
+            string repakBindPath = Path.Combine(libsPath, "repak_bind.dll");
+            if (!HasAlreadyExtractedRepak || !File.Exists(repakBindPath))
+            {
+                HasAlreadyExtractedRepak = true;
+                Program.ExtractCompressedResource("UAssetAPI.repak_bind.dll.gz", repakBindPath, typeof(UAsset).Assembly);
+                if (File.Exists(repakBindPath)) NativeLibrary.Load(repakBindPath);
+            }
+
+            LoadContainer(CurrentContainerPath);
+            RefreshTreeView(saveTreeView);
+        }
+
+        public void Localize()
+        {
+            fileToolStripMenuItem.Text = UAGConfig.GetString("Menu.File");
+            loadToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.File.Open");
+            saveToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.File.Save");
+            stageFromDiskToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.File.StageFromDisk");
+            stageFromDiskToPathToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.File.StageFromDiskToPath");
+            editToolStripMenuItem.Text = UAGConfig.GetString("Menu.Edit");
+            cutToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Edit.Cut");
+            copyToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Edit.Copy");
+            pasteToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Edit.Paste");
+            deleteToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Edit.Delete");
+            viewToolStripMenuItem.Text = UAGConfig.GetString("Menu.View");
+            expandAllToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.ExpandAll");
+            collapseAllToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.CollapseAll");
+            toggleFlatViewToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.ToggleFlatView");
+            applyFilterToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.ApplyFilter");
+            refreshToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.View.Refresh");
+            utilsToolStripMenuItem.Text = UAGConfig.GetString("Menu.Utils");
+            extractAllToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Utils.ExtractAll");
+            setRetocCommandLineParametersToolStripMenuItem.Text = UAGConfig.GetString("FileContainerForm.Menu.Utils.SetExtraRetocParameters");
+
+            loadButton.Text = UAGConfig.GetString("FileContainerForm.Button.Load");
+            saveButton.Text = UAGConfig.GetString("FileContainerForm.Button.Save");
+        }
+
+        private static volatile Dictionary<ToolStripItem, bool> isDropDownOpened = new Dictionary<ToolStripItem, bool>();
+        public static bool IsDropDownOpened(ToolStripItem item)
+        {
+            if (!isDropDownOpened.ContainsKey(item)) return false;
+            return isDropDownOpened[item];
+        }
+
+        public void AddDirectoryItemChildrenToTreeView(DirectoryTreeItem treeItem, PointingFileTreeNode dad, string filter, bool forceAddChildrenOfChildren = false, bool disableDynamicTree = false)
+        {
+            if (!UAGConfig.Data.EnableDynamicTree) disableDynamicTree = true;
+            dad.ChildrenInitialized = forceAddChildrenOfChildren || disableDynamicTree;
+            foreach (KeyValuePair<string, DirectoryTreeItem> directoryItem in treeItem.Children)
+            {
+                if (directoryItem.Value.Children.Count > 0 || string.IsNullOrEmpty(filter) || directoryItem.Value.FullPath.Contains(filter))
+                {
+                    var newDad = new PointingFileTreeNode(directoryItem.Value.Name, directoryItem.Value);
+                    newDad.ChildrenInitialized = false;
+                    dad.Nodes.Add(newDad);
+                    if (dad.ChildrenInitialized) AddDirectoryItemChildrenToTreeView(directoryItem.Value, newDad, filter, false, disableDynamicTree);
+                }
+            }
+        }
+
+        public void ExpandedToHashSet(TreeNodeCollection nodes, HashSet<string> hashSet)
+        {
+            foreach (TreeNode node in nodes)
+            {
+                if (node is PointingFileTreeNode pftNode)
+                {
+                    if (pftNode.IsExpanded) hashSet.Add(pftNode.Pointer.FullPath);
+                    ExpandedToHashSet(pftNode.Nodes, hashSet);
+                }
+            }
+        }
+
+        // this method doesn't collapse already-expanded nodes
+        public void HashSetToExpanded(TreeNodeCollection nodes, HashSet<string> hashSet)
+        {
+            foreach (TreeNode node in nodes)
+            {
+                if (node is PointingFileTreeNode pftNode)
+                {
+                    if (hashSet.Contains(pftNode.Pointer.FullPath)) pftNode.Expand();
+                    HashSetToExpanded(pftNode.Nodes, hashSet);
+                }
+            }
+        }
+
+        public PointingFileTreeNode GetSpecificNode(TreeNodeCollection nodes, string fullPath)
+        {
+            foreach (TreeNode node in nodes)
+            {
+                if (node is PointingFileTreeNode pftNode)
+                {
+                    if (fullPath == pftNode.Pointer.FullPath) return pftNode;
+                    if (fullPath.StartsWith(pftNode.Pointer.FullPath)) // we know this is an ancestor node
+                    {
+                        if (!pftNode.ChildrenInitialized) InitializeChildren(pftNode);
+                        var gotten = GetSpecificNode(node.Nodes, fullPath);
+                        if (gotten != null) return gotten;
+                        break; // obviously no sibling node to this node can be also an ancestor node
+                    }
+                }
+            }
+            return null;
+        }
+
+        public PointingFileTreeNode GetSpecificNode(TreeView treeView, string fullPath)
+        {
+            return GetSpecificNode(treeView.Nodes, fullPath);
+        }
+
+        public PointingFileTreeNode GetSpecificNode(string fullPath)
+        {
+            var res = GetSpecificNode(loadTreeView, fullPath);
+            if (res != null) return res;
+            res = GetSpecificNode(saveTreeView, fullPath);
+            if (res != null) return res;
+
+            return null;
+        }
+
+        public DirectoryTreeItem GetFromPackageName(TreeView treeView, string packageName)
+        {
+            DirectoryTree tree = DirectoryTreeMap[treeView];
+            if (tree?.PackagePathToNode == null || !tree.PackagePathToNode.ContainsKey(packageName)) return null;
+            return tree.PackagePathToNode[packageName];
+        }
+
+        public void RefreshTreeView(TreeView treeView)
+        {
+            if (!FlatViewEnabled.ContainsKey(treeView)) FlatViewEnabled[treeView] = false;
+            UAGUtils.InvokeUI(() => RefreshTreeViewInner(treeView, FlatViewEnabled[treeView]));
+        }
+
+        private int PruneChildren(PointingFileTreeNode branchNode)
+        {
+            if (branchNode?.Nodes == null) return 0;
+
+            int n = 0;
+            for (int nodeIdx = 0; nodeIdx < branchNode.Nodes.Count; nodeIdx++)
+            {
+                if (branchNode.Nodes[nodeIdx] != null && branchNode.Nodes[nodeIdx] is PointingFileTreeNode pftn)
+                {
+                    if (pftn.Pointer == null) continue;
+                    if (!pftn.Pointer.IsFile && pftn.Nodes.Count == 0)
+                    {
+                        // directories with no children need to be removed
+                        branchNode.Nodes.RemoveAt(nodeIdx);
+                        n++;
+                        nodeIdx--;
+                    }
+                    else
+                    {
+                        n += PruneChildren(pftn);
+                    }
+                }
+            }
+            return n;
+        }
+
+        private void RefreshTreeViewInner(TreeView treeView, bool flatView)
+        {
+            if (treeView == null || !DirectoryTreeMap.ContainsKey(treeView)) return;
+
+            treeView.SuspendLayout();
+
+            // get existing expanded nodes
+            HashSet<string> FullPathsOfNodesToExpand = new HashSet<string>();
+            ExpandedToHashSet(treeView.Nodes, FullPathsOfNodesToExpand);
+
+            if (treeView == saveTreeView)
+            {
+                // update directory tree
+                string[] stagingFiles = UAGConfig.GetStagingFiles(this.CurrentContainerPath, out string[] fixedPathsOnDisk);
+                DirectoryTreeMap[treeView] = new DirectoryTree(this, stagingFiles, fixedPathsOnDisk);
+            }
+
+            if (!Filter.ContainsKey(treeView)) Filter[treeView] = null;
+            string filter = Filter[treeView];
+            bool filterExists = !string.IsNullOrEmpty(filter);
+
+            treeView.Nodes.Clear();
+            DirectoryTree currentTree = DirectoryTreeMap[treeView];
+            if (flatView && currentTree?.RootNodesFlat != null)
+            {
+                List<TreeNode> nodes = new List<TreeNode>();
+                foreach (KeyValuePair<string, DirectoryTreeItem> directoryItem in currentTree.RootNodesFlat.OrderBy(p => p.Value.FullPath))
+                {
+                    // we can just filter here because in flat view nodes never have children
+                    if (string.IsNullOrEmpty(filter) || directoryItem.Value.FullPath.Contains(filter))
+                    {
+                        var dad = new PointingFileTreeNode(directoryItem.Value.FullPath, directoryItem.Value);
+                        nodes.Add(dad);
+                    }
+                }
+                treeView.Nodes.AddRange(nodes.ToArray());
+            }
+            else
+            {
+                if (currentTree?.RootNodes != null)
+                {
+                    List<PointingFileTreeNode> nodes = new List<PointingFileTreeNode>();
+                    foreach (KeyValuePair<string, DirectoryTreeItem> directoryItem in currentTree.RootNodes)
+                    {
+                        var dad = new PointingFileTreeNode(directoryItem.Value.Name, directoryItem.Value);
+                        nodes.Add(dad);
+                        AddDirectoryItemChildrenToTreeView(directoryItem.Value, dad, filter, false, filterExists); // disable dynamic tree if filtering
+                    }
+
+                    // filter has been applied to files, but we need to prune empty branches now
+                    if (filterExists)
+                    {
+                        for (int iter = 0; iter < 20; iter++) // max 20 iterations
+                        {
+                            int numPruned = 0;
+                            for (int nodeIdx = 0; nodeIdx < nodes.Count; nodeIdx++)
+                            {
+                                if (nodes[nodeIdx] != null && nodes[nodeIdx] is PointingFileTreeNode pftn)
+                                {
+                                    if (pftn.Pointer == null) continue;
+                                    if (!pftn.Pointer.IsFile && pftn.Nodes.Count == 0)
+                                    {
+                                        // directories with no children need to be removed
+                                        nodes.RemoveAt(nodeIdx);
+                                        numPruned++;
+                                        nodeIdx--;
+                                    }
+                                    else
+                                    {
+                                        numPruned += PruneChildren(pftn);
+                                    }
+                                }
+                            }
+
+                            if (numPruned == 0) break; // nothing else to prune
+                        }
+                    }
+
+                    treeView.Nodes.AddRange(nodes.ToArray());
+                }
+
+                treeView.Sort();
+            }
+
+            HashSetToExpanded(treeView.Nodes, FullPathsOfNodesToExpand);
+
+            if (treeView.Nodes.Count > 0)
+            {
+                treeView.BackColor = UAGPalette.BackColor;
+            }
+            else
+            {
+                treeView.BackColor = UAGPalette.InactiveColor;
+            }
+
+            treeView.ResumeLayout();
+        }
+
+        public void UnloadContainer()
+        {
+            CurrentContainerPath = null;
+            DirectoryTreeMap[loadTreeView] = null;
+            Version = PakVersion.V4;
+            InteropType = InteropType.Pak;
+            MountPoint = "../../../";
+
+            RefreshTreeView(loadTreeView);
+            this.Text = BaseForm.DisplayVersion + " - " + CurrentContainerPath;
+            SelectedTreeView = saveTreeView;
+        }
+
+        public void LoadContainerPak(string path)
+        {
+            if (path == null) return;
+            try
+            {
+                CurrentContainerPath = path;
+                InteropType = InteropType.Pak;
+
+                string[] allFiles = Array.Empty<string>();
+                using (FileStream stream = new FileStream(CurrentContainerPath, FileMode.Open))
+                {
+                    var pakReader = new PakBuilder().Reader(stream);
+                    allFiles = pakReader.Files();
+                    Version = pakReader.GetVersion();
+                    MountPoint = pakReader.GetMountPoint();
+                }
+
+                // if the MountPoint starts with "../../../", then let's adjust all files so we can just change the MountPoint to that
+                string mpPrefix = "../../../";
+                string Prefix = "";
+                if (MountPoint.StartsWith(mpPrefix))
+                {
+                    Prefix = MountPoint.Substring(mpPrefix.Length);
+                    MountPoint = mpPrefix;
+
+                    for (int i = 0; i < allFiles.Length; i++)
+                    {
+                        allFiles[i] = Path.Combine(Prefix, allFiles[i]);
+                    }
+                }
+
+                DirectoryTreeMap[loadTreeView] = new DirectoryTree(this, allFiles, null, Prefix);
+                RefreshTreeView(loadTreeView);
+
+                this.Text = BaseForm.DisplayVersion + " - " + CurrentContainerPath;
+                SelectedTreeView = loadTreeView;
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(string.Format(UAGConfig.GetString("Error.Generic"), ex.Message), BaseForm.DisplayVersion);
+
+                UnloadContainer();
+            }
+        }
+
+        public static readonly string ReadOnlyTempPath = Path.Combine(UAGConfig.TempFolder, "UAG_read_only");
+        public static readonly string RetocTempPath = Path.Combine(UAGConfig.TempFolder, "UAG_retoc");
+
+        public void LoadContainerUtoc(string path)
+        {
+            if (path == null) return;
+
+            bool retocAvailable = false;
+            string outputText = string.Empty; string errorText = string.Empty;
+            try
+            {
+                retocAvailable = SendCommandToRetoc($"{RetocExtraCommands} --version", out outputText, out errorText) && outputText.Contains("retoc_cli");
+            }
+            catch (Exception ex)
+            {
+                UAGUtils.InvokeUI(() =>
+                {
+                    MessageBox.Show(string.Format(UAGConfig.GetString("FileContainerForm.Error.LaunchRetoc"), ex.Message + "\n" + ex.StackTrace), BaseForm.DisplayVersion);
+                });
+                return;
+            }
+
+            if (!retocAvailable)
+            {
+                UAGUtils.InvokeUI(() =>
+                {
+                    MessageBox.Show(string.Format(UAGConfig.GetString("FileContainerForm.Error.LaunchRetoc"), outputText + "\n" + errorText), BaseForm.DisplayVersion);
+                });
+                return;
+            }
+
+            try
+            {
+                CurrentContainerPath = path;
+                InteropType = InteropType.Retoc;
+                Version = PakVersion.V11;
+                MountPoint = "../../../"; // retoc always uses this mount point
+
+                // extract file manifest
+                string tempPathForPakstore = Path.Combine(RetocTempPath, $"pakstore_{Path.GetRandomFileName()}");
+                Directory.CreateDirectory(RetocTempPath);
+                Directory.CreateDirectory(tempPathForPakstore);
+
+                string expectedManifestPath = Path.Combine(tempPathForPakstore, "pakstore.json");
+                UAGUtils.DeleteFileQuick(expectedManifestPath);
+                bool extractedManifest = FileContainerForm.SendCommandToRetoc($"{RetocExtraCommands} manifest \"{Path.GetDirectoryName(path)}\"", out _, out _, false, tempPathForPakstore);
+                RetocManifest manifestData = JsonConvert.DeserializeObject<RetocManifest>(File.ReadAllText(expectedManifestPath));
+
+                if (manifestData.OpLog.Entries == null) throw new InvalidOperationException("Failed to extract manifest");
+
+                // process manifest
+                List<string> allFilesList = new List<string>();
+                foreach (RetocOp op in manifestData.OpLog.Entries)
+                {
+                    if (op.PackageData == null) continue;
+                    foreach (RetocChunkData chunk in op.PackageData)
+                    {
+                        if (!string.IsNullOrEmpty(chunk.FileName))
+                        {
+                            // we expect the filename to always start with MountPoint, but we check anyways
+                            allFilesList.Add(chunk.FileName.StartsWith(MountPoint) ? chunk.FileName.Substring(MountPoint.Length) : chunk.FileName);
+                        }
+                    }
+                }
+
+                string[] allFiles = allFilesList.ToArray();
+                DirectoryTreeMap[loadTreeView] = new DirectoryTree(this, allFiles, null, string.Empty);
+                RefreshTreeView(loadTreeView);
+
+                this.Text = BaseForm.DisplayVersion + " - " + CurrentContainerPath;
+                SelectedTreeView = loadTreeView;
+            }
+            catch (Exception ex)
+            {
+                UAGUtils.InvokeUI(() =>
+                {
+                    MessageBox.Show(string.Format(UAGConfig.GetString("Error.Generic"), ex.Message), BaseForm.DisplayVersion);
+                });
+
+                UnloadContainer();
+            }
+        }
+
+        public void LoadContainer(string path)
+        {
+            if (path == null) return;
+
+            string ext = Path.GetExtension(path);
+            switch(ext)
+            {
+                case ".pak":
+                    LoadContainerPak(path);
+                    break;
+                case ".utoc":
+                    LoadContainerUtoc(path);
+                    break;
+                case ".ucas":
+                    LoadContainerUtoc(Path.ChangeExtension(path, ".utoc"));
+                    break;
+                default:
+                    UAGUtils.InvokeUI(() => { MessageBox.Show(string.Format(UAGConfig.GetString("FileContainerForm.Error.UnknownExtension"), ext), BaseForm.DisplayVersion); });
+                    break;
+            }
+        }
+
+        public bool SaveContainer(string path)
+        {
+            if (path == null) return false;
+            string[] stagingFiles = UAGConfig.GetStagingFiles(this.CurrentContainerPath, out string[] fixedPathsOnDisk);
+            if (stagingFiles == null || fixedPathsOnDisk == null || stagingFiles.Length != fixedPathsOnDisk.Length) return false;
+
+            switch (Path.GetExtension(path))
+            {
+                case ".pak":
+                    using (FileStream stream = new FileStream(path, FileMode.Create))
+                    {
+                        var pakWriter = new PakBuilder().Writer(stream, Version, MountPoint);
+                        for (int i = 0; i < stagingFiles.Length; i++)
+                        {
+                            string ext = Path.GetExtension(fixedPathsOnDisk[i]);
+                            if (ext == ".bak" || fixedPathsOnDisk[i].EndsWith(".bak.json")) continue;
+                            pakWriter.WriteFile(stagingFiles[i], File.ReadAllBytes(fixedPathsOnDisk[i]));
+                        }
+                        pakWriter.WriteIndex();
+                    }
+                    break;
+                case ".utoc":
+                    string engVer = ((RetocEngineVersion)BaseForm.ParsingVersion).ToString();
+                    FileContainerForm.SendCommandToRetoc($"{RetocExtraCommands} to-zen --version {engVer} \"{UAGConfig.GetStagingDirectory(path)}\" \"{path}\"", out _, out _);
+                    break;
+            }
+
+            return true;
+        }
+
+        public static bool SendCommandToRetoc(string args, out string outputText, out string errorText, bool displayConsole = false, string workingDirectory = null)
+        {
+            outputText = null;
+            errorText = null;
+
+            string libsPath = Path.Combine(UAGConfig.ConfigFolder, "Libraries");
+            string retocPath = Path.Combine(libsPath, "retoc.exe");
+            Directory.CreateDirectory(UAGConfig.ConfigFolder);
+            Directory.CreateDirectory(libsPath);
+
+            if (!HasAlreadyExtractedRetoc || !File.Exists(retocPath)) ExtractRetoc();
+
+            Process process = new Process();
+            process.StartInfo.FileName = retocPath;
+            process.StartInfo.Arguments = args;
+            process.StartInfo.WorkingDirectory = workingDirectory ?? libsPath;
+            process.StartInfo.UseShellExecute = displayConsole ? true : false;
+            process.StartInfo.RedirectStandardOutput = displayConsole ? false : true;
+            process.StartInfo.RedirectStandardError = displayConsole ? false : true;
+            process.StartInfo.CreateNoWindow = displayConsole ? false : true;
+
+            process.Start();
+
+            if (process.StartInfo.RedirectStandardOutput) outputText = process.StandardOutput.ReadToEnd().TrimEnd();
+            if (process.StartInfo.RedirectStandardError) errorText = process.StandardError.ReadToEnd().TrimEnd();
+            process.WaitForExit();
+            int errorCode = process.ExitCode;
+            process.Close();
+
+            return errorCode == 0;
+        }
+
+        private static bool HasAlreadyExtractedRetoc = false;
+        private static bool HasAlreadyExtractedRepak = false;
+        public static string ExtractRetoc()
+        {
+            HasAlreadyExtractedRetoc = true;
+            string libsPath = Path.Combine(UAGConfig.ConfigFolder, "Libraries");
+            Directory.CreateDirectory(UAGConfig.ConfigFolder);
+            Directory.CreateDirectory(libsPath);
+
+            return Program.ExtractCompressedResource($"UAssetGUI.retoc.exe.gz", Path.Combine(libsPath, "retoc.exe"));
+        }
+
+        public void ForceResize()
+        {
+            splitContainer1.Size = new Size(this.Size.Width - 28, this.Size.Height - menuStrip1.Size.Height - 50);
+            splitContainer1.Panel1.Size = new Size(splitContainer1.SplitterDistance, splitContainer1.Size.Height);
+            splitContainer1.Panel2.Size = new Size(splitContainer1.Size.Width - splitContainer1.SplitterDistance, splitContainer1.Size.Height);
+            loadButton.Location = new Point((splitContainer1.Panel1.Size.Width - loadButton.Size.Width) / 2, loadButton.Location.Y);
+            saveButton.Location = new Point((splitContainer1.Panel2.Size.Width - saveButton.Size.Width) / 2, saveButton.Location.Y);
+            loadTreeView.Location = new Point(0, loadButton.Location.Y + loadButton.Size.Height + 6);
+            loadTreeView.Size = new Size(splitContainer1.Panel1.Size.Width, splitContainer1.Panel1.Size.Height - loadTreeView.Location.Y);
+            saveTreeView.Location = new Point(0, saveButton.Location.Y + saveButton.Size.Height + 6);
+            saveTreeView.Size = new Size(splitContainer1.Panel2.Size.Width, splitContainer1.Panel2.Size.Height - saveTreeView.Location.Y);
+        }
+
+        private void FileContainerForm_SizeChanged(object sender, EventArgs e)
+        {
+            ForceResize();
+        }
+
+        private void splitContainer1_SplitterMoved(object sender, SplitterEventArgs e)
+        {
+            ForceResize();
+        }
+
+        private void FileContainerForm_Shown(object sender, EventArgs e)
+        {
+            splitContainer1.SplitterDistance = (this.Size.Width - 28) / 2;
+            ForceResize();
+        }
+
+        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
+        {
+            switch (keyData)
+            {
+                case Keys.Control | Keys.X:
+                    cutToolStripMenuItem.PerformClick();
+                    return true;
+                case Keys.Control | Keys.C:
+                    copyToolStripMenuItem.PerformClick();
+                    return true;
+                case Keys.Control | Keys.V:
+                    pasteToolStripMenuItem.PerformClick();
+                    return true;
+                case Keys.Delete:
+                    deleteToolStripMenuItem.PerformClick();
+                    return true;
+            }
+
+            return base.ProcessCmdKey(ref msg, keyData);
+        }
+
+        private void expandAllToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            this.SelectedTreeView?.ExpandAll();
+        }
+
+        private void collapseAllToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            this.SelectedTreeView?.CollapseAll();
+        }
+
+        private void refreshToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            RefreshTreeView(loadTreeView);
+            RefreshTreeView(saveTreeView);
+        }
+
+        private void loadButton_Click(object sender, EventArgs e)
+        {
+            loadToolStripMenuItem.PerformClick();
+        }
+
+        private void saveButton_Click(object sender, EventArgs e)
+        {
+            saveToolStripMenuItem.PerformClick();
+        }
+
+        private void treeView_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
+        {
+            if (e?.Node != null && e.Node is PointingFileTreeNode pftNode)
+            {
+                if (pftNode.Pointer.IsFile) pftNode.Pointer.OpenFile();
+            }
+        }
+
+        private DirectoryTreeItem copiedPftNode = null;
+        private bool shouldDeleteCopiedPftNode = false;
+        private void copyToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (this.SelectedTreeView?.SelectedNode is PointingFileTreeNode pftNode)
+            {
+                if (pftNode == null) return;
+
+                copiedPftNode = pftNode.Pointer;
+                shouldDeleteCopiedPftNode = false;
+            }
+        }
+
+        private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (this.SelectedTreeView?.SelectedNode is PointingFileTreeNode pftNode)
+            {
+                if (copiedPftNode == null || pftNode == null) return;
+                DirectoryTreeItem clipboardNode = copiedPftNode;
+
+                if (string.IsNullOrEmpty(pftNode.Pointer.FixedPathOnDisk)) return; // only allow pasting into staging
+                DirectoryTreeItem targetDirectory = pftNode.Pointer;
+                if (targetDirectory.IsFile) targetDirectory = targetDirectory.Parent;
+
+                string desiredStagingPath = Path.Combine(targetDirectory?.FullPath ?? string.Empty, clipboardNode.Name);
+                clipboardNode.StageFile(desiredStagingPath);
+
+                if (shouldDeleteCopiedPftNode)
+                {
+                    clipboardNode.DeleteFile();
+                    shouldDeleteCopiedPftNode = false;
+                }
+            }
+        }
+
+        private void deleteToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (this.SelectedTreeView?.SelectedNode is PointingFileTreeNode pftNode)
+            {
+                if (pftNode == null) return;
+                if (string.IsNullOrEmpty(pftNode.Pointer.FixedPathOnDisk)) return; // only allow deleting from staging
+
+                pftNode.Pointer.DeleteFile();
+            }
+        }
+
+        private void cutToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (this.SelectedTreeView?.SelectedNode is PointingFileTreeNode pftNode)
+            {
+                if (pftNode == null) return;
+                if (string.IsNullOrEmpty(pftNode.Pointer.FixedPathOnDisk)) return; // only allow cutting from staging
+
+                copiedPftNode = pftNode.Pointer;
+                shouldDeleteCopiedPftNode = true;
+            }
+        }
+
+        private void event_DragEnter(object sender, DragEventArgs e)
+        {
+            if (e.Data.GetDataPresent(DataFormats.FileDrop)) e.Effect = DragDropEffects.Copy;
+        }
+
+        private void loadTreeView_DragDrop(object sender, DragEventArgs e)
+        {
+            string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
+            if (files.Length > 0) LoadContainer(files[0]);
+        }
+
+        private void saveTreeView_DragDrop(object sender, DragEventArgs e)
+        {
+            string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
+            if (files.Length > 0)
+            {
+                UAGConfig.StageFile(files[0], CurrentContainerPath);
+                this.RefreshTreeView(this.saveTreeView);
+            }
+        }
+
+        private void loadTreeView_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
+        {
+            saveTreeView.SelectedNode = null;
+            this.SelectedTreeView = loadTreeView;
+        }
+
+        private void saveTreeView_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
+        {
+            loadTreeView.SelectedNode = null;
+            this.SelectedTreeView = saveTreeView;
+        }
+
+        private void loadToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            using (System.Windows.Forms.OpenFileDialog openFileDialog = new System.Windows.Forms.OpenFileDialog())
+            {
+                openFileDialog.Filter = "Unreal Engine Container Files (*.pak, *.utoc)|*.pak;*.utoc|All files (*.*)|*.*";
+                openFileDialog.FilterIndex = 1;
+                openFileDialog.RestoreDirectory = true;
+
+                if (openFileDialog.ShowDialog() == DialogResult.OK)
+                {
+                    LoadContainer(openFileDialog.FileName);
+                }
+            }
+        }
+
+        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            using (System.Windows.Forms.SaveFileDialog dialog = new System.Windows.Forms.SaveFileDialog())
+            {
+                dialog.Filter = ".pak Container Files (*.pak)|*.pak|.utoc Container Files (*.utoc)|*.utoc|All files (*.*)|*.*";
+                dialog.FilterIndex = 1;
+                dialog.RestoreDirectory = true;
+
+                DialogResult res = dialog.ShowDialog();
+                if (res == DialogResult.OK)
+                {
+                    bool success = SaveContainer(dialog.FileName);
+                    if (!success) MessageBox.Show(string.Format(UAGConfig.GetString("Error.FailedToSave"), string.Empty), BaseForm.DisplayVersion);
+                }
+                else if (res != DialogResult.Cancel)
+                {
+                    MessageBox.Show(string.Format(UAGConfig.GetString("Error.FailedToSave"), string.Empty), BaseForm.DisplayVersion);
+                }
+            }
+        }
+
+        private void stageFromDiskToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            using (System.Windows.Forms.OpenFileDialog openFileDialog = new System.Windows.Forms.OpenFileDialog())
+            {
+                openFileDialog.Filter = "All files (*.*)|*.*";
+                openFileDialog.FilterIndex = 1;
+                openFileDialog.RestoreDirectory = true;
+
+                if (openFileDialog.ShowDialog() == DialogResult.OK)
+                {
+                    UAGConfig.StageFile(openFileDialog.FileName, CurrentContainerPath);
+                    this.RefreshTreeView(this.saveTreeView);
+                }
+            }
+        }
+
+        private void stageFromDiskToPathToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            using (System.Windows.Forms.OpenFileDialog openFileDialog = new System.Windows.Forms.OpenFileDialog())
+            {
+                openFileDialog.Filter = "All files (*.*)|*.*";
+                openFileDialog.FilterIndex = 1;
+                openFileDialog.RestoreDirectory = true;
+
+                if (openFileDialog.ShowDialog() == DialogResult.OK)
+                {
+                    TextPrompt replacementPrompt = new TextPrompt()
+                    {
+                        DisplayText = UAGConfig.GetString("FileContainerForm.Prompt.StageToPath"),
+                        Text = this.Text
+                    };
+
+                    replacementPrompt.StartPosition = FormStartPosition.CenterParent;
+                    replacementPrompt.PrefilledText = Path.GetFileName(openFileDialog.FileName) ?? string.Empty;
+
+                    string newFileName = null;
+                    if (replacementPrompt.ShowDialog(ParentForm) == DialogResult.OK)
+                    {
+                        newFileName = string.Join("_", replacementPrompt.OutputText.Replace('\\', '/').Split(Path.GetInvalidPathChars(), StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.');
+                    }
+
+                    replacementPrompt.Dispose();
+
+                    if (newFileName != null)
+                    {
+                        UAGConfig.StageFile(openFileDialog.FileName, CurrentContainerPath, newFileName);
+                        this.RefreshTreeView(this.saveTreeView);
+                    }
+                }
+            }
+        }
+
+        private void InitializeChildren(PointingFileTreeNode ptn)
+        {
+            if (!ptn.ChildrenInitialized)
+            {
+                ptn.Nodes.Clear();
+                if (!Filter.ContainsKey(ptn.TreeView)) Filter[ptn.TreeView] = null;
+                AddDirectoryItemChildrenToTreeView(ptn.Pointer, ptn, Filter[ptn.TreeView], true);
+            }
+        }
+
+        private void treeView_BeforeExpand(object sender, TreeViewCancelEventArgs e)
+        {
+            if (e.Node is PointingFileTreeNode ptn) InitializeChildren(ptn);
+        }
+
+        private void ExtractVisit(DirectoryTreeItem processingNode, ProgressBarForm progressBarForm, FileStream stream2 = null, PakReader reader2 = null)
+        {
+            if (processingNode.IsFile)
+            {
+                UAGConfig.ExtractFile(processingNode, this.InteropType, stream2, reader2);
+                extractAllBackgroundWorker.ReportProgress(0); // the percentage we pass in is unused
+                return;
+            }
+
+            foreach (var entry in processingNode.Children)
+            {
+                if (extractAllBackgroundWorker.CancellationPending) break;
+                ExtractVisit(entry.Value, progressBarForm, stream2, reader2);
+            }
+        }
+
+        private ProgressBarForm progressBarForm;
+        private void extractAllToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (!DirectoryTreeMap.TryGetValue(loadTreeView, out DirectoryTree loadedTree) || loadedTree == null)
+            {
+                MessageBox.Show(UAGConfig.GetString("FileContainerForm.Prompt.ExtractNoContainer"), BaseForm.DisplayVersion);
+                return;
+            }
+
+            switch(InteropType)
+            {
+                case InteropType.Pak:
+                    if (extractAllBackgroundWorker.IsBusy) return;
+
+                    int numFiles = loadedTree.GetNumFiles();
+
+                    UAGUtils.InvokeUI(() =>
+                    {
+                        progressBarForm = new ProgressBarForm();
+                        progressBarForm.Value = 0;
+                        progressBarForm.Maximum = numFiles;
+                        progressBarForm.Text = this.Text;
+                        progressBarForm.BaseForm = this;
+                        progressBarForm.Show(this);
+                    });
+
+                    extractAllBackgroundWorker.RunWorkerAsync();
+                    break;
+                case InteropType.Retoc:
+                    if (extractAllBackgroundWorker.IsBusy) return;
+                    extractAllBackgroundWorker.RunWorkerAsync();
+                    break;
+                default:
+                    MessageBox.Show($"This operation is not supported for the current interop type ({InteropType.ToString()}).", BaseForm.DisplayVersion);
+                    break;
+            }
+        }
+
+        private void extractAllBackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
+        {
+            Directory.CreateDirectory(UAGConfig.ExtractedFolder);
+
+            switch (InteropType)
+            {
+                case InteropType.Pak:
+                    if (!DirectoryTreeMap.TryGetValue(loadTreeView, out DirectoryTree loadedTree) || loadedTree == null) throw new InvalidOperationException("No container loaded");
+
+                    using (FileStream stream = new FileStream(this.CurrentContainerPath, FileMode.Open))
+                    {
+                        var reader = new PakBuilder().Reader(stream);
+                        foreach (var entry in loadedTree.RootNodes)
+                        {
+                            if (extractAllBackgroundWorker.CancellationPending) break;
+                            ExtractVisit(entry.Value, progressBarForm, stream, reader);
+                        }
+                    }
+
+                    if (extractAllBackgroundWorker.CancellationPending)
+                    {
+                        e.Cancel = true;
+                        return;
+                    }
+                    UAGUtils.OpenDirectory(UAGConfig.ExtractedFolder);
+                    break;
+                case InteropType.Retoc:
+                    FileContainerForm.SendCommandToRetoc($"{RetocExtraCommands} to-legacy \"{Path.GetDirectoryName(CurrentContainerPath)}\" \"{UAGConfig.ExtractedFolder}\"", out _, out _, true);
+                    UAGUtils.OpenDirectory(UAGConfig.ExtractedFolder);
+                    break;
+            }
+        }
+
+        private void extractAllBackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
+        {
+            UAGUtils.InvokeUI(() => progressBarForm.Progress(1));
+        }
+
+        private void extractAllBackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
+        {
+            UAGUtils.InvokeUI(() =>
+            {
+                if (e.Cancelled)
+                {
+                    MessageBox.Show(UAGConfig.GetString("Generic.Prompt.OperationCanceled"), BaseForm.DisplayVersion);
+                }
+                else if (e.Error != null)
+                {
+                    MessageBox.Show(string.Format(UAGConfig.GetString("FileContainerForm.Prompt.ExtractError"), e.Error.Message), BaseForm.DisplayVersion);
+                }
+                else
+                {
+                    MessageBox.Show(progressBarForm == null ? UAGConfig.GetString("Generic.Prompt.OperationCompleted") : string.Format(UAGConfig.GetString("FileContainerForm.Prompt.ExtractDoneCount"), progressBarForm.Value), BaseForm.DisplayVersion);
+                }
+                progressBarForm?.Close();
+            });
+        }
+
+        private void toggleFlatViewToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (SelectedTreeView == null || FlatViewEnabled == null) return;
+            if (!FlatViewEnabled.ContainsKey(SelectedTreeView)) FlatViewEnabled[SelectedTreeView] = false;
+            FlatViewEnabled[SelectedTreeView] = !FlatViewEnabled[SelectedTreeView];
+            RefreshTreeView(SelectedTreeView);
+        }
+
+        private void applyFilterToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            UAGUtils.InvokeUI(() =>
+            {
+                TextPrompt replacementPrompt = new TextPrompt()
+                {
+                    DisplayText = UAGConfig.GetString("FileContainerForm.Prompt.ApplyFilter"),
+                    Text = this.Text,
+                    AllowEmptyText = true
+                };
+
+                replacementPrompt.StartPosition = FormStartPosition.CenterParent;
+                replacementPrompt.PrefilledText = string.Empty;
+
+                string filter = null;
+                if (replacementPrompt.ShowDialog(ParentForm) == DialogResult.OK)
+                {
+                    filter = replacementPrompt.OutputText;
+                }
+
+                replacementPrompt.Dispose();
+
+                if (filter != null && loadTreeView != null && this.Filter != null)
+                {
+                    this.Filter[loadTreeView] = filter;
+                    RefreshTreeView(loadTreeView);
+                }
+            });
+        }
+
+        private void setRetocCommandLineParametersToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            UAGUtils.InvokeUI(() =>
+            {
+                TextPrompt replacementPrompt = new TextPrompt()
+                {
+                    DisplayText = UAGConfig.GetString("FileContainerForm.Prompt.SetExtraRetocParameters"),
+                    Text = this.Text,
+                    AllowEmptyText = true
+                };
+
+                replacementPrompt.StartPosition = FormStartPosition.CenterParent;
+                replacementPrompt.PrefilledText = RetocExtraCommands;
+
+                if (replacementPrompt.ShowDialog(ParentForm) == DialogResult.OK)
+                {
+                    RetocExtraCommands = replacementPrompt.OutputText;
+                }
+
+                replacementPrompt.Dispose();
+            });
+        }
+    }
+
+    public class PointingFileTreeNode : TreeNode
+    {
+        public DirectoryTreeItem Pointer;
+        public bool ChildrenInitialized = false;
+
+        public PointingFileTreeNode(string text, DirectoryTreeItem item) : base(text)
+        {
+            Pointer = item;
+            //NodeFont = new Font(new FontFamily("Microsoft Sans Serif"), 8.25f);
+
+            this.ContextMenuStrip = new ContextMenuStrip();
+            ToolStripMenuItem tsmItem = null;
+
+            if (Pointer.IsFile)
+            {
+                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.Open"));
+                tsmItem.Click += (sender, args) => Pointer.OpenFile();
+                this.ContextMenuStrip.Items.Add(tsmItem);
+            }
+
+            if (Pointer.FixedPathOnDisk == null)
+            {
+                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.Extract"));
+                tsmItem.Click += (sender, args) =>
+                {
+                    string outPath = UAGConfig.ExtractPakNode(Pointer, item.ParentForm.InteropType);
+                    if (outPath == null) return;
+                    if ((Path.GetExtension(outPath)?.Length ?? 0) > 0) outPath = Path.GetDirectoryName(outPath);
+                    UAGUtils.OpenDirectory(outPath);
+                };
+                this.ContextMenuStrip.Items.Add(tsmItem);
+                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.Stage"));
+                tsmItem.Click += (sender, args) => Pointer.StageFile();
+                this.ContextMenuStrip.Items.Add(tsmItem);
+                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.StageToPath"));
+                tsmItem.Click += (sender, args) => Pointer.StageFileToPath();
+                this.ContextMenuStrip.Items.Add(tsmItem);
+            }
+
+            if (Pointer.FixedPathOnDisk != null)
+            {
+                tsmItem = new ToolStripMenuItem(UAGConfig.GetString("FileContainerForm.ContextMenu.Delete"));
+                tsmItem.Click += (sender, args) => Pointer.DeleteFile();
+                this.ContextMenuStrip.Items.Add(tsmItem);
+            }
+        }
+    }
+
+    public class DirectoryTree
+    {
+        public FileContainerForm ParentForm;
+        public IDictionary<string, DirectoryTreeItem> RootNodes;
+        public IDictionary<string, DirectoryTreeItem> RootNodesFlat;
+        public IDictionary<string, DirectoryTreeItem> PackagePathToNode;
+
+        public DirectoryTree(FileContainerForm parentForm)
+        {
+            RootNodes = new Dictionary<string, DirectoryTreeItem>();
+            RootNodesFlat = new Dictionary<string, DirectoryTreeItem>();
+            PackagePathToNode = new Dictionary<string, DirectoryTreeItem>();
+            ParentForm = parentForm;
+        }
+
+        public DirectoryTree(FileContainerForm parentForm, string[] paths, string[] fixedAssetsOnDisk = null, string prefix = null)
+        {
+            RootNodes = new Dictionary<string, DirectoryTreeItem>();
+            RootNodesFlat = new Dictionary<string, DirectoryTreeItem>();
+            PackagePathToNode = new Dictionary<string, DirectoryTreeItem>();
+            ParentForm = parentForm;
+
+            if (fixedAssetsOnDisk != null && fixedAssetsOnDisk.Length == paths.Length)
+            {
+                for (int i = 0; i < paths.Length; i++) this.CreateNode(paths[i], fixedAssetsOnDisk[i], prefix);
+            }
+            else
+            {
+                for (int i = 0; i < paths.Length; i++) this.CreateNode(paths[i], null, prefix);
+            }
+        }
+
+        private static int GetNumFilesVisit(DirectoryTreeItem item)
+        {
+            if (item.IsFile) return 1;
+
+            int numFiles = 0; // to count directories too, set to 1
+            foreach (var entry in item.Children) numFiles += GetNumFilesVisit(entry.Value);
+            return numFiles;
+        }
+
+        public int GetNumFiles()
+        {
+            int numFiles = 0;
+            foreach (var entry in RootNodes) numFiles += GetNumFilesVisit(entry.Value);
+            return numFiles;
+        }
+
+        public DirectoryTreeItem GetRootNode(string component)
+        {
+            if (RootNodes.TryGetValue(component, out var node)) return node;
+            return null;
+        }
+
+        public DirectoryTreeItem GetNode(string path)
+        {
+            string[] pathComponents = path.Split('/');
+            if (pathComponents.Length == 0) return null;
+            if (!RootNodes.ContainsKey(pathComponents[0])) return null;
+
+            DirectoryTreeItem currentItem = RootNodes[pathComponents[0]];
+            for (int i = 1; i < pathComponents.Length; i++)
+            {
+                currentItem = currentItem.Children[pathComponents[i]];
+            }
+            return currentItem;
+        }
+
+        private static readonly Regex ProjectWithContentPrefixRegex = new Regex(@"^\/?[^\s\/]+\/Content", RegexOptions.Compiled);
+
+        public DirectoryTreeItem CreateNode(string path, string fixedAssetOnDisk = null, string prefix = null)
+        {
+            string[] pathComponents = path.Split('/');
+            if (pathComponents.Length == 0) return null;
+
+            string[] fixedAssetOnDiskComponents = fixedAssetOnDisk?.Split(Path.DirectorySeparatorChar) ?? Array.Empty<string>();
+            string startingFixedAssetOnDisk = string.Empty;
+            if (fixedAssetOnDiskComponents.Length > pathComponents.Length)
+            {
+                string[] fixedAssetOnDiskComponentsNuevo = new string[fixedAssetOnDiskComponents.Length - pathComponents.Length];
+                Array.Copy(fixedAssetOnDiskComponents, fixedAssetOnDiskComponentsNuevo, fixedAssetOnDiskComponentsNuevo.Length);
+                startingFixedAssetOnDisk = string.Join(Path.DirectorySeparatorChar, fixedAssetOnDiskComponentsNuevo);
+            }
+
+            if (!RootNodes.ContainsKey(pathComponents[0]))
+            {
+                string ext = Path.GetExtension(pathComponents[0]);
+                if (ext.Length > 1 && (ext == ".uexp" || ext == ".ubulk" || ext == ".bak")) return null;
+
+                RootNodes[pathComponents[0]] = new DirectoryTreeItem(ParentForm, pathComponents[0], pathComponents[0], ext.Length > 1, prefix);
+            }
+
+            DirectoryTreeItem currentItem = RootNodes[pathComponents[0]];
+            if (startingFixedAssetOnDisk.Length > 0)
+            {
+                startingFixedAssetOnDisk = Path.Combine(startingFixedAssetOnDisk, pathComponents[0]);
+                currentItem.FixedPathOnDisk = startingFixedAssetOnDisk;
+            }
+
+            for (int i = 1; i < pathComponents.Length; i++)
+            {
+                string ext = Path.GetExtension(pathComponents[i]);
+                if (ext.Length > 1 && (ext == ".uexp" || ext == ".ubulk" || ext == ".bak" || pathComponents[i].EndsWith(".bak.json"))) return null;
+
+                if (!currentItem.Children.ContainsKey(pathComponents[i]))
+                {
+                    currentItem.Children[pathComponents[i]] = new DirectoryTreeItem(ParentForm, pathComponents[i], currentItem.FullPath + "/" + pathComponents[i], ext.Length > 1, prefix);
+                    currentItem.Children[pathComponents[i]].Parent = currentItem;
+                }
+                currentItem = currentItem.Children[pathComponents[i]];
+
+                if (startingFixedAssetOnDisk.Length > 0)
+                {
+                    startingFixedAssetOnDisk = Path.Combine(startingFixedAssetOnDisk, pathComponents[i]);
+                    currentItem.FixedPathOnDisk = startingFixedAssetOnDisk;
+                }
+            }
+
+            RootNodesFlat[currentItem.FullPath.Replace('\\', '/').Replace(Path.DirectorySeparatorChar, '/')] = currentItem;
+
+            // todo, this algorithm needs to be fixed for plugins
+            // Engine/Plugins/Animation/ControlRig/Content/Controls/ControlRigGizmoMaterial.uasset => /ControlRig/Controls/ControlRigGizmoMaterial
+            string packageName = Path.ChangeExtension(currentItem.FullPath, null).Replace('\\', '/').Replace(Path.DirectorySeparatorChar, '/').Replace("Engine/Content/", "Engine/");
+            packageName = ProjectWithContentPrefixRegex.Replace(packageName, "/Game", 1);
+            if (!packageName.StartsWith('/')) packageName = '/' + packageName;
+            PackagePathToNode[packageName] = currentItem;
+
+            return currentItem;
+        }
+    }
+
+    public class DirectoryTreeItem
+    {
+        public FileContainerForm ParentForm;
+        public string Name;
+        public string FullPath;
+        public string FixedPathOnDisk;
+        public string Prefix;
+        public bool IsFile = false;
+        public DirectoryTreeItem Parent;
+        public IDictionary<string, DirectoryTreeItem> Children;
+
+        public string SaveFileToTemp(InteropType interopType, string outputPathDirectory = null, FileStream stream2 = null, PakReader reader2 = null)
+        {
+            outputPathDirectory = outputPathDirectory ?? Path.Combine(FileContainerForm.ReadOnlyTempPath, Path.GetFileNameWithoutExtension(ParentForm.CurrentContainerPath));
+            
+            string outputPath1 = Path.Combine(outputPathDirectory, FullPath.Replace('/', Path.DirectorySeparatorChar));
+            string outputPath2 = Path.Combine(outputPathDirectory, Path.ChangeExtension(FullPath, ".uexp").Replace('/', Path.DirectorySeparatorChar));
+            string outputPath3 = Path.Combine(outputPathDirectory, Path.ChangeExtension(FullPath, ".ubulk").Replace('/', Path.DirectorySeparatorChar));
+            Directory.CreateDirectory(Path.GetDirectoryName(outputPath1)); // same directory as outputPath2, no need to create that one too
+
+            if (FixedPathOnDisk != null)
+            {
+                File.Copy(FixedPathOnDisk, outputPath1, true);
+                try { File.Copy(Path.ChangeExtension(FixedPathOnDisk, ".uexp"), outputPath2, true); } catch { }
+                try { File.Copy(Path.ChangeExtension(FixedPathOnDisk, ".ubulk"), outputPath3, true); } catch { }
+                return outputPath1;
+            }
+
+            switch(interopType)
+            {
+                case InteropType.Pak:
+                    {
+                        if (reader2 == null || stream2 == null)
+                        {
+                            using (FileStream stream = new FileStream(ParentForm.CurrentContainerPath, FileMode.Open))
+                            {
+                                var reader = new PakBuilder().Reader(stream);
+                                string basePath = FullPath.Substring(Prefix?.Length ?? 0);
+
+                                byte[] res = reader.Get(stream, basePath);
+                                if (res == null) return null;
+                                UAGUtils.DeleteFileQuick(outputPath1);
+                                File.WriteAllBytes(outputPath1, res);
+                                res = null;
+
+                                res = reader.Get(stream, Path.ChangeExtension(basePath, ".uexp"));
+                                UAGUtils.DeleteFileQuick(outputPath2);
+                                if (res != null) { File.WriteAllBytes(outputPath2, res); res = null; }
+
+                                res = reader.Get(stream, Path.ChangeExtension(basePath, ".ubulk"));
+                                UAGUtils.DeleteFileQuick(outputPath3);
+                                if (res != null) { File.WriteAllBytes(outputPath3, res); res = null; }
+                            }
+                        }
+                        else
+                        {
+                            string basePath = FullPath.Substring(Prefix?.Length ?? 0);
+                            byte[] res = reader2.Get(stream2, basePath);
+
+                            if (res == null) 
+                                return null;
+
+                            UAGUtils.DeleteFileQuick(outputPath1);
+                            File.WriteAllBytes(outputPath1, res);
+                            res = null;
+
+                            res = reader2.Get(stream2, Path.ChangeExtension(basePath, ".uexp"));
+                            UAGUtils.DeleteFileQuick(outputPath2);
+                            if (res != null) {
+                                File.WriteAllBytes(outputPath2, res); 
+                                res = null; 
+                            }
+
+                            res = reader2.Get(stream2, Path.ChangeExtension(basePath, ".ubulk"));
+                            UAGUtils.DeleteFileQuick(outputPath3);
+                            if (res != null) { 
+                                File.WriteAllBytes(outputPath3, res); 
+                                res = null; 
+                            }
+                        }
+                    }
+                    break;
+                case InteropType.Retoc:
+                    string targetPath = FullPath.Substring(Prefix?.Length ?? 0);
+                    string origPathPrefix = Path.Combine(FileContainerForm.RetocTempPath, "RetocFiles");
+                    bool retocSuccess = FileContainerForm.SendCommandToRetoc($"{FileContainerForm.RetocExtraCommands ?? string.Empty} to-legacy --filter \"{targetPath}\" \"{Path.GetDirectoryName(ParentForm.CurrentContainerPath)}\" \"{origPathPrefix}\"", out _, out _);
+                    if (!retocSuccess) return null;
+
+                    string origPath1 = Path.Combine(origPathPrefix, targetPath);
+                    UAGUtils.MoveFileQuick(Path.ChangeExtension(origPath1, "uasset"), outputPath1, true);
+                    UAGUtils.MoveFileQuick(Path.ChangeExtension(origPath1, "umap"), outputPath1, true);
+                    UAGUtils.MoveFileQuick(Path.ChangeExtension(origPath1, "uexp"), outputPath2, true);
+                    UAGUtils.MoveFileQuick(Path.ChangeExtension(origPath1, "ubulk"), outputPath3, true);
+                    break;
+            }
+
+            return outputPath1;
+        }
+
+        public void OpenFile()
+        {
+            string outputPath = FixedPathOnDisk != null ? FixedPathOnDisk : this.SaveFileToTemp(this.ParentForm.InteropType);
+            if (outputPath == null)
+            {
+                MessageBox.Show(string.Format(UAGConfig.GetString("Error.Generic"), string.Empty), this.ParentForm.BaseForm.DisplayVersion);
+                return;
+            }
+
+            string ext = Path.GetExtension(outputPath);
+            if (ext == ".uasset" || ext == ".umap")
+            {
+                this.ParentForm.BaseForm.LoadFileAt(outputPath, this.ParentForm);
+                this.ParentForm.BaseForm.Focus();
+            }
+            else
+            {
+                new Process
+                {
+                    StartInfo = new ProcessStartInfo(outputPath) { UseShellExecute = true }
+                }.Start(); // open externally
+            }
+        }
+
+        public void StageFile(string newPath = null)
+        {
+            if (newPath == null) newPath = this.FullPath;
+
+            UAGConfig.StageFile(this, this.ParentForm.InteropType, newPath);
+            this.ParentForm.RefreshTreeView(this.ParentForm.saveTreeView);
+
+            var generatedNode = this.ParentForm.GetSpecificNode(this.ParentForm.saveTreeView, newPath);
+            if (generatedNode == null) return;
+            generatedNode.EnsureVisible();
+            this.ParentForm.saveTreeView.SelectedNode = generatedNode;
+        }
+
+        public void StageFileToPath()
+        {
+            UAGUtils.InvokeUI(() =>
+            {
+                TextPrompt replacementPrompt = new TextPrompt()
+                {
+                    DisplayText = "What path should this object be staged to?"
+                };
+
+                replacementPrompt.StartPosition = FormStartPosition.CenterParent;
+                replacementPrompt.PrefilledText = this.FullPath ?? string.Empty;
+
+                string newFileName = null;
+                if (replacementPrompt.ShowDialog(ParentForm) == DialogResult.OK)
+                {
+                    newFileName = string.Join("_", replacementPrompt.OutputText.Replace('\\', '/').Split(Path.GetInvalidPathChars(), StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.');
+                }
+
+                replacementPrompt.Dispose();
+
+                if (newFileName != null)
+                {
+                    this.StageFile(newFileName);
+                }
+            });
+        }
+
+        public void DeleteFile()
+        {
+            if (FixedPathOnDisk == null) return;
+
+            bool success = UAGUtils.DeleteFileQuick(FixedPathOnDisk);
+            UAGUtils.DeleteFileQuick(Path.ChangeExtension(FixedPathOnDisk, ".uexp"));
+            UAGUtils.DeleteFileQuick(Path.ChangeExtension(FixedPathOnDisk, ".ubulk"));
+            
+            if (!success)
+            {
+                UAGUtils.DeleteDirectoryQuick(FixedPathOnDisk, true);
+            }
+
+            FixedPathOnDisk = null;
+            this.ParentForm.RefreshTreeView(this.ParentForm.saveTreeView);
+        }
+
+        public DirectoryTreeItem(FileContainerForm parentForm, string name, string fullPath, bool isFile, string prefix)
+        {
+            ParentForm = parentForm;
+            FullPath = fullPath;
+            Name = Path.GetFileName(name);
+            IsFile = isFile;
+            Prefix = prefix;
+            Children = new Dictionary<string, DirectoryTreeItem>();
+        }
+
+        public DirectoryTreeItem(FileContainerForm parentForm)
+        {
+            ParentForm = parentForm;
+            Children = new Dictionary<string, DirectoryTreeItem>();
+        }
+    }
+}
diff --git a/UAssetGUI/UAGConfig.cs b/UAssetGUI/UAGConfig.cs
index 3ccd0f3..1046a19 100644
--- a/UAssetGUI/UAGConfig.cs
+++ b/UAssetGUI/UAGConfig.cs
@@ -203,6 +203,60 @@ public static string ExtractFile(DirectoryTreeItem item, InteropType interopType
             return item.SaveFileToTemp(interopType, ExtractedFolder, stream2, reader2);
         }
 
+        public static string ExtractPakNode(DirectoryTreeItem item, InteropType interopType)
+        {
+            var finalPath = Path.Combine(ExtractedFolder, item.FullPath.Replace('/', Path.DirectorySeparatorChar));
+
+            List<DirectoryTreeItem> ItemsToExport = GetNodeItemList(item);
+
+            if (ItemsToExport.Count > 0)
+            {
+
+                using (FileStream stream = new FileStream(item.ParentForm.CurrentContainerPath, FileMode.Open))
+                {
+                    using (var reader = new PakBuilder().Reader(stream))
+                    {
+                        foreach (var child in ItemsToExport)
+                            child.SaveFileToTemp(interopType, ExtractedFolder, stream, reader);
+                    }
+                }
+            }
+
+            return finalPath;
+        }
+
+        public static List<DirectoryTreeItem> GetNodeItemList(DirectoryTreeItem rootNode)
+        {
+            var ExportFiles = new List<DirectoryTreeItem>();
+            var FolderStack = new Stack<DirectoryTreeItem>();
+
+            if (rootNode.IsFile)
+            {
+                ExportFiles.Add(rootNode);
+                return ExportFiles;
+            }
+
+            FolderStack.Push(rootNode);
+
+            while (FolderStack.Count > 0)
+            {
+                var iterItem = FolderStack.Pop();
+
+                foreach (var child in iterItem.Children.Values)
+                {
+                    if (child.IsFile)
+                    {
+                        ExportFiles.Add(child);
+                    } 
+                    else
+                    {
+                        FolderStack.Push(child);
+                    }
+                }
+            }
+
+            return ExportFiles;
+        }
         public static bool TryGetMappings(string name, out Usmap mappings)
         {
             if (AllMappings.TryGetValue(name, out string value))