Would like to upgrade from Paralles7 to Parallels15

[JB_1]

I'd like to upgrade from Parallels7 to Parallels15

I have Paralles7,8 serial key installed on my old 2010,2011 macbook.

This time, I bought new Macbooks
I'd like to upgrade from Paralles7,8 to 15

Pls can anyone tell me how?
OS are Mojave and Katalina

 

[Maria@Parallels]

I'd like to upgrade from Parallels7 to Parallels15
I have Paralles7,8 serial key installed on my old 2010,2011 macbook.
This time, I bought new Macbooks
I'd like to upgrade from Paralles7,8 to 15
Pls can anyone tell me how?
OS are Mojave and Katalina

Hi,
please purchase upgrade version from parallels.com and install and active it with these instructions.
You can use your Parallels Desktop 7 or 8 license and new received Parallels Desktop 15 for the upgrade activation.