Can't even try Parallels 20 for free 14 days

Well, I have a Parallels Desktop 14 license (Mac OS) for life. But I'm trying to run Parallels 20 to see if it even is worth it its humongous cost, and since I already have an activation key for 14, doesn't allow me to even try version 20. So, do you Parallels people think I could even consider "upgrading" to 20 just because? Come on! With your expensive and cumbersome policies all you're doing is losing customers.