I agree - das ist scheisse. If we could patch it, we'd do so right away. The problem remains though that we weren't involved in the setting up of the digital distribution versions in Germany and have no info/control over that process. It's possible that with some editing of your registry information you might get the installer to run, but we're afraid to advise you on that at this point, as we don't know how the digital distribution mechanisms work, and it might ruin your previous game. We've contacted the digital distributors and hopefully we'll be able to come to an agreement with them soon.