Hi there,
Sorry to hear about this. How do you have the game -- through our installer, or through Steam? How did you get the latest version -- our updater, or Steam? If you're on steam, verifying the cache would probably fix it.
If you have it through our installer, you probably need to reinstall that over top of itself and then try updating again. I have a suspicion that my errors with the patching system yesterday (really sorry about that) may have borked your installation.
If you still have problems, then there may be something that I did wrong with the upgrade path for the non-steam version, which is why I ask how you have the game. There are a variety of ways that people can get to the latest version, and I may have messed something up for one of the paths but not the others.
Thanks for your support and patience!
Best,
Chris