: If you need to move the license to a new computer, you can use the MAGIX Service Center to deactivate an old machine. This "deactivation" link is found under your registered product details and can generally be used once per month .
is the most common choice if you are referring to a specific, unique code belonging to a single user or installation (e.g., "I lost Sony Vegas Pro 16 serial number that came with my box"). Sony Vegas Pro 16 Serial Number
Vegas Pro 16 requires a one-time online registration to validate the license. How go get a serial number? - VEGAS Community : If you need to move the license