A couple people have run into this problem. Unfortunately, I have not seen any reports of a solution (it has been awhile since it has come up, though). You may want to email support@larian.com, if you haven't already.

Can't get into any door, game exits to windows


AFAIK the patch would have to come through the online distributor (either the 1.03 patch or the upcoming patch, expected about the same time as the FoV/DKS release, next month); the patch downloads for the DVD version are not compatible.