i got a problem with activation on Win 8.1 64 bit.
I got a new mainboard and reinstalled my whole system.
After activation of Premiere Elements the program tells me to deactivate an other pc before I can activate a new one. But I can't deactivate that anymore.
The matter that you present can only be sorted out with online Adobe Chat.
That link is for
Adobe ID, Signing In
Adobe ID, Sign In, Account Help
Adobe allows you to have your purchased activated serial number on no more than 2 of your computers. If you go to a 3rd, then you have to deactivate one of the two with the purchased activated serial number. In Premiere Elements 13 you use Help Menu/Sign Out for the deactivation before the uninstall.
Any questions or need clarification, please ask. Just in case mention...this is not Adobe, rather user to user.
Please let us know the outcome as your schedule permits.