Since the latest patch, I've been unable to play the game and get the following message: Civilization V: Campaign Edition is damaged and cant be opened. Delete Civilization V: Campaign Edition and download it again from the App Store. I've reinstalled the game 5 times with no success. I can get to the launch menu and reinstall the DLC content, then the game launches. It always opens fine the first time. I then change the video resolution to widescreen, and change any settings and quit the game. I'm unable to reopen it again. I'm running it on a Late 2012 iMac (OS X 10.9.2). Any help would be greatly appreciated.