I got it figured out! For me, at least, the problem was that I was on the Early Access (Patreon) build of EmuDeck. For some reason the launcher files got borked with the 3.5 update. I switched back to the mainline build and everything works again.

I’m in the same boat, very bummed. Pretty much all of my standalone emulators are borked :(

This is great news! I was just thinking that my biggest headache would be reconfiguring everything just now I like it (Decky plugins, EmuDeck, etc.). Sounds like I should be able to get the OLED pop off the back and throw my current SSD/micro SD in there and it will work!

I assume it brings over all the Linux configs too, like your sudo password?