Hi taoster,
Sorry, not sure what caused this. Did the autopatcher give you any sort of indicative message? I threw a bunch of messages into the autopatcher for various potential failures, so if you saw one it would be helpful. (There may not have been one, the same thing happened to TJ once and I figured it was just a fluke)
As for fixing the issue, you can manually download the latest version from this thread (use the second link), or you can delete your settings.ini file and the autopatcher will redownload everything for you.