I have three 'Permanent' subscriptions logged in my account. I was under the impression that these are automatically renewed and that I can use the same code for any new versions that come along. Yesterday, I downloaded v13 of Parallels for Mac, upgraded, but it didn't allow me to use my existing code. Instead, I had no choice but to buy an upgrade subscription, but notice this is a new entry in my account that I don't think I needed. Can a representative at Parallels explain?