when you have played "Victory Day Edition" you must delete "testkey" first.
start windows "regedit.exe" and navigate to key: [HKEY_CURRENT_USER\Software\1C\Men of War]
on right window you can see you login name with CD-key.
a.) doubleklick to name and write your new cd-key (ABCD-1234-EFGH-5678-IJKL).
b.) or ... mark this line -> right mouse -> delete.
start MoW -> login -> [b.) enter your cd-key] -> play.