I received an upgrade key but don't have a previous version to upgrade from?

Hello! I was just wondering if anyone could help me? A few days ago I purchased the full version of Parallels 11, but when I went to install it I put in the activation key I got in my email but it's telling me that what I typed in was an upgrade key, and that I also need an activation key from a previous version. I've never owned a previous version of Parallels before so I don't know what to do seeing as I don't have any previous activation codes? I only have the one code that it sent me via email. I've checked several times that the code is entered properly, and I've also read over the email I received several times but I can't find a solution. If someone could please tell me what to do or give me a line of support I could contact that would be great! Thank you for your time.

 

Hi GeorgeS4, please check your Private Message.