My setup:

• Linux ( 6.8.0 kernel, Pop! OS, X11)
• PNGTuber Plus 1.4.5

Issue:
Pressing any number key either top row or keypad doesn't change costumes. Attempting to override the defaults just indefinitely says "Awaiting input...".

Troubleshooting notes:
I made sure to follow tutorials on how costumes work. Select a part, blue number means it is visible in that costume.

I used other keyboard actions without issue. ie ESC to open directory folder.

In trying to set new a new input if numbers didn't work, I attempted every key. F keys, numbers, letters, characters, etc.

I even tried manually editing settings.pngtp. I tried lower case letters, and KEY_X.

I saw others had this issue on reddit. One solution was to downgrade to the previous version. I looked at the diff between 1.4.2 and 1.4.5 in /main_scene/main.gd, but couldn't figure out what change would cause this. I also haven't learned Godot yet, so who knows.