In February, they released a hotfix that made the game unplayable on my machine, and the machines of many other people. They have said they are "aware" of the problem in private responses to bug reports, but they haven't made any public announcements or given any indication on when it will be fixed. Like I explained just a few posts above the one you clearly read?
I had to go to GOG and buy the game again so I could choose to only install up to the previous hotfix, in order to start a new game and play it again.
