Ask for a full refund from the original purchaser, especially if Fastcut was what you really wanted to buy.How to resolve this situation? If this was happening to me I would Is that correct? And there you were asked to enter a serial number? Did you see an option to 'register' or 'activate' the software? Did you try pressing that? If you did, what happened? I think that should have taken you to a screen on the Magix website where you could 'register' your software and then be sent a serial key by email.
When you wrote that when I downloaded it asked for my serial number, I assume you mean you attempted to install it from the DVD. Given the above, and returning to your original question I think I now understand the problem you are having. Depending on how much you were charged for this disc (which, I would have to say, appears to be potentially an illegal copy) I would ask for a full refund because: Two things to note about the stated contents of that disc: