How to upgrade purchased license to my store

Hi

Bought a license and would like to upgrade to my store.
But there is no buttom or link that I can copy my code with.

Tried to delete the free version from store and instal the one that from downloads pag, BUT the ones from download pages always fail.

My store cannot use the pro version nor can I upgrade the license to store. After checking the manual, I found my plugin page is different from yours, no upgrade page is displayed.