The game is sold at
the company's site, so I had to remove your link. We can't help you with the copy protection since you can't prove that you rightfully own a copy. You would have to know your registration code, download the game from the site above and register again. The last chance would be to
e-mail the files to Wiering Software, and ask them if they are able to check the authenticity in order to retrieve the registration code or get new one.