My old Mac has hardware issues. I moved my drive to a new Mac of identical "Model Identifier" MacBookAir6,1. And I took the liberty to upgrade to 10.14 Mojave. However now Parallels Desktop 8 says: Activate The e-mail address listed there activatepd@parallels.com is no longer active. Neither is the http/https server at address http://activatepd.parallels.com/ How to get my good old PD version 8 activated again?