Adding premier to a re formatted pc

Hi there,
I recently re formatted my PC and installed avast again. When i did it wasn’t the premier avast. I go to my account and see that there are 2 versions of my pc. One which was the pre re format and one that is the free version. I am just wondering how i am to add my pc to the premier version

See: https://www.avast.com/faq.php?article=AVKB270