Anyone else find that switching to Full Tilt mode suddenly isn't working?

[LumenCrest]

I've had all the correct files set up on my Linux/Steam Deck instance properly for days and had a blast playing the FT version, but suddenly despite them not moving from the proper folder and appearing fine afaik, it's defaulting to the MS demo again. Anyone else getting this?

[LumenCrest]

(upon further analysis, app version is 2.1.1 DEV - not sure if this means anything but will note anyway because it's not listed anywhere on the app pages)