I have the Gamers Gate version on my computer, I purchased expansions in the Halloween sale, I can not find my key through Gamers Gate as I have a new computer and downloaded the backup version to my new computer. How do I get the new expansions on to my computer? I have added my version of Crusader Kings 2 to my steam account as a non steam game, but I am unable to activate any of the expansions I purchased. I keep getting the following error message: Could not activate Steam Key: Does not own required app (status code 400)