Today I saw a pop-up from the Parallels Desktop window that said since I was a valuable member, I was offered a free upgrade to 19 from 18. I installed the upgrade happily but then I was asked to enter the activation key for Parallels Desktop 19. And then, I was not able to proceed to launching Windows. Interestingly, I was able to install Debian 12 successfully (and of course, unable to launch it). Then I googled "downgrading Parallels Desktop" and reinstalled PD 18 back because I need to work on Windows tonight. But I was still able to use the fresh install of Debian 12 (thanks to PD 19). I deleted it anyway though. My question is, do I get to upgrade to 19 free of charge? I remember getting another free upgrade from 16 to 17 a few years back. Thank you.