You'll have to buy a new license for Zorin 18 pro, but you'll get a discount. If you just a few weaks ago have purchased Zorin 17 pro you can contact the Zorin group.
You can take a look at this thread:
You'll have to buy a new license for Zorin 18 pro, but you'll get a discount. If you just a few weaks ago have purchased Zorin 17 pro you can contact the Zorin group.
You can take a look at this thread: