We checked the integrity of your files, there is nothing wrong with them. Patch.dv2 is unique for every edition for the game (Retal/Steam/impulse/larians/etc) but, AFAIR, it does not contain anything related to your issue. Hmm... really weird.
If you want, we can compare all other files just in case. But so far, the only difference I noticed is Divinity2.exe and Patch.dv2 files.
Also - check PM.