My problem is slightly different. Around the beginning of July, the Uplay program, which appears before the game starts, was updated. After this update, the game either starts or doesn't (most often it doesn't).
I hoped that patch 1.5 would fix it, but that didn't happen. To be more specific: I click on "PLAY," a small window appears with an image of Michael and some kind of demon, and then it just hangs. Sometimes a black screen appears. Please advise if you know how to fix this.