Change Title & Logo - MeshCommander and MeshCommander Firwmare?

Hi - Does anyone know how one can easily change the title and logo of MeshCommander and MeshCommander firmware?

Since the firmware uses a complied .exe to push the firmware - There doesnt seem to be an easy way to updating the index file.
Via the AMT web gui - I can download the index file but cannot easily uploading it again.

Thanks