Oh gosh, my apologies for this nuisance of a bug, especially if you tried to fullscreen before turning down the audio - I've been experimenting to see if I can figure out where this came from. I'll do my best to resolve it asap, and thank you so much for letting me know!
Update: Sorry to spam you a bit, but I believe the problem should be repaired! I'm uploading the new files now. Thank you so so much for making me aware of it. A very weird issue had occurred where the gui was angry it couldn't find a particular image, and for some reason only going to fullscreen on the prefs menu made it realise it was missing!
If you continue to have issues, please do let me know! I'll do my best to handle it if it's still a problem.