I purchased VEGAS Movie Studio 17 Platinum as a digital download through Amazon and was sent the download link and serial number.
When trying to register I'm getting: "The serial number you entered is invalid or may apply to another product. Please make sure you entered it correctly or check whether you accidentally entered the serial number of another product. If the problem persists, you can get help on the support website. Error code: -14"

Uninstalling and reinstalling gets the same result.