Also running into the blank menu GUI issue on my Steam Deck. Ran swconfig.exe, adjusted the .ini, ran UniWS, and ran the HR menus.bat, all mapping the game to 1281x801. The game boots fine, but as soon as I add the 1280x800 .gui files into the mix, the issue begins.
RIP: I installed it between Dark Sacrifice and Saber Knockback, so I'll have to just rebuild. I'll probably do that after this playthrough: thanks for answering!
If I want to use this update, do I need to uninstall the previous version and then install this one? Or can I just install the update over the top of it? I'm using the full KotOR mod build.