I haven't been able to activate Culture Shock on my machine. I have activated all the other episodes (Season 1 and 2). Initially I downloaded Culture Shock from www.gamershell.com, but when it wouldn't activate I uninstalled and downloaded the version from the "My Games" page on the Telltale website. However, after installing it that it wouldn't activate either. I'm running Vista x64.
I have sent an email to support about manual activation but is there a better solution?