http://bugs.winehq.org/show_bug.cgi?id=35055
--- Comment #3 from Sergey Guralnik serhio@etersoft.ru 2013-12-06 00:39:06 CST --- (In reply to comment #2)
Have you confirmed that reverting the patch fixes your bug? It fixes the case where a product is patched, which normally means that the product version is incremented. So a version check is probably not sufficient.
Yes, bug disappears after reverting. Maybe you have some another ideas related to SourceDir setting? Probably there should be some additional conditions for using registered value.