Hi there, I have two Parallels 9 keys and but have a need for a 3rd key now - can I buy 3 upgrades for Parallels Desktop 10 or do I need to buy two upgrades and one full license?
Hello Dr Rob. You may upgrade your Parallels Desktop 9 to 10th version buy purchasing _two_ upgrade keys. If you need one more Parallels Desktop 10 license, please purchase a full Parallels Desktop 10 key. Because Parallels Desktop 10 upgrade key won't work alone, you have to provide an additional Parallels Desktop 9 full/upgrade key to use it. In Sum: 2 upgrade keys, 1 full in your case.