The MixVibes DVS development ended appx 10 years ago. Using it at a new PC (W10?) may result in some issues.
You might want to give the Cross DVS version a try, which is the successor of the MV DVS.
The 'Cross Demo' version may help you by the decision making...
If you want to try to have you MV DVS license activated it may be an option to send an email to
support@mixvibes.com. But please don't consider it a promise that they can do it still.