This is from the EULA link given by Steve Rhoden.
3.1 Together with the MAGIX Product you will receive an individual serial number which you must enter during installation. A one-time registration as well as online activation are also required. Using the serial number, you can activate the MAGIX Product for the number of Computers specified in the serial number; each Computer will be assigned a License Seat. If the number of License Seats specified in the serial number is exceeded, a license seat must be deactivated in order to activate the product again.