Okay. I'm assuming the game with the problem is the original Open Sorcery, not Jingle BEL/S, since the Funbuns aren't in Jingle BEL/S.
I was unable to recreate your crash on my Windows 10 machine. But I did encounter some Steam interference that could be causing issues.
I stripped out all the parts of my executable that interact with Steam. Please re-download and try again and tell me if that helps.