Welcome to the forum, @lysergide. You don’t need to do anything: your existing Padshop license will continue to work as it does now. For more information, please read the eLicenser section of the Steinberg Licensing FAQ.
I was wondering if i would be able to use Padshop on multiple computers ? since this is what was stated as one of the changes in the “new licensing scheme”
I guess that will apply when they do a major update. Hard to guess, it is included in cubase and are sold as a separate product. So for cubase 12 owners should work with the new system. But it was also updated for cubase 11.