👋 I mightve forgotten to test out borderless properly... I believe you can delete the resolution settings in the windows registry at key Computer\HKEY_CURRENT_USER\Software\TVC-16\Funtography .
The resolution dropdown currently doesn't look at the current resolution, so if you checked fullscreen it likely defaulted to 640x480.
I recommend playing windowed for now, as you can resize the window anyway you want and the fake OS resolution will match.