VAG-COM-FAQ-3.6
From Ross-Tech Wiki
3.6 What if I need to run VAG-COM on more than one PC?
Purchase of a VAG-COM software license entitles the buyer to simultaneous use of the program on only one PC. If you have a need to run VAG-COM on more than one PC, you should buy one of our Current Interfaces (which have Activation built in). Existing registered customers are eligible for Upgrades to our newer interfaces.