Bought upgrade to 12. Old activation key not working.

[DrPasadena]

Had parallels 9 installed, bought the upgrade to 12 and my old activation key is not working. Is it possible to only pay the difference for the new key?

 

[PaulChristopher@Parallels]

Had parallels 9 installed, bought the upgrade to 12 and my old activation key is not working. Is it possible to only pay the difference for the new key?

Hi @DrPasadena, please check your private message and reply if you have any questions.