"Please be aware that the Free Upgrade offer is only available for iClone 3DXchange 1.x English version purchase users, and iClone 3DXchange 2 requires iClone 2.5 (or above) English Version installed to access."
So that is why the upgrade isn't available for the Magix German version I'm afraid. Have you tried contacting Magix to see if you can change to the english version?
Peter EdwardsForum Moderator
iClone Daily Blog