Linux Mint 18.1 64 bit can't use buttons/load graphics

[JankMultiMediaStudio]

I've tried loading in 3d models and sprites, but when clicking the upload button, nothing happens. Dragging the resource into the window brings it up in text form and then backing out closes the project file. I also loaded up the included 2d platformer to find the same issues, loading the pre-existing assets just causes it to hang on loading.

I tried launching it from the terminal, but there isn't any useful output.

Launching the 32 bit version seems to cause no errors, and everything runs smoothly.