To unlock the Pro features on a machine running a compatible operating system, follow these steps: On Windows Open QuickTime Player 7.
The registration system is extremely strict. A key will only validate if the Registered To name perfectly matches the text tied to the key, including spaces and punctuation.
Apple has discontinued the sale of QuickTime Pro keys.
QuickTime 7 was originally distributed as a free player. To access its advanced features, users had to purchase a 20-digit registration code from the Apple Store to unlock the "Pro" tier.