Don't worry about activation, just get the new patch.As I have see now there are two expansions for Scourge of War: Gettysburg so I re-installed the game on my PC.
But when I enter my activation code I get the following error message:
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Scourge of War - Gettysburg
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This code is currently active.
You need to deactivate the game that is using it before it can be used again.
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Maybe I have forgotten to deactivate Scourge of War before I deinstalled it the last time.
What to do?