You might want to uninstall and a fresh install might have jumbled files, I've had this downloaded since .6 all I ever do is download the new version and update the game never had a problem...
You'll love the new update once you get it fixed this is by farm my favorite story I've ever read:)
Sorry, I don't know what would be causing that. All I can recommend is deleting your game files (your save should be stored separately, so you won't lose it), and then downloading a fresh install.
