I have the retail version of Galactic Civilations II Ultimate Edition and I see there is an update for the game. I can't get the update becuse the game is not registered. I can't register the game becasue I can't find where the serial number is supposed to be at. There is no sticker in the box or on the the manual. I read in another post that maybe "Ultimate Edition" didn't have a serial number, if that's true how do I register to get the update available?