Currently using PNGtuber plus on Windows 10 and the hot keys are not working. The default numbers don't change the costume and when trying to set a different costume, it is not accepting any input at all. It just says "awaiting input" and no matter what key i press, nothing happens. Am a bit at a loss. 

Having the same issue, I booted up an older version I had downloaded (1.2.1) and it was working fine in that prior release. Running Windows 11 and the program as administrator.

Not sure if you're still having this problem but make sure all 3 of the files from the zipfolder are unzipped. This fixed my problem with any hotkey binding not accepting input.