Thank you so much, this helped a lot. I made the mistake cancelling the melodyne installer at first install of it. The problem was that it got checked in the BA Addons and I couldn't install it anymore und even didn'T find an installer file anywhere. Now I deleted the registry key BF750169-C7A9-4CDF-92DC-DA0E49FF6F9C (it contains e.g. "Product Version") and I could install Melodyne using BA. Best regards and  ThxAloT again