So I need to double check but I think I may have a line on what’s going on.
I installed Pixnub Platinum on my old laptop
When I moved to my desktop I installed it there too. Two machines.
Then I had that problem with Adobe, and had to create a new user account on my desktop. So that would have been 3 user accounts and Pixnub only allows 2 I think.
I don’t have my laptop in front of me right now, so when I do I will remove the laptop as one of the accounts and see what happens.