Mac OSX
Completely exit from the Steam client.
Go to /Users/[Username]/Library/Application Support/Steam
Locate ClientRegistry.blob and rename this file to ClientRegistryOld.blob.
Restart Steam to allow the file to be recreated.
Test the issue once more
My problem now appears to be that I...
Can anyone help me find the fake files on Steam so I can play as the German national side for example? I have downloaded FM2012 via Steam on my Mac. Many thanks!