I have bought the pro license at July 2021 and used this software until mid of january. Suddenly the software ask me again for license code, and after I input my code, the software still on free version mode and not changed to PRO version. Please assist me regarding this problem

Hello, I hope you are well.
I had aready register the code the i got the email after paid for it.
and when i check programe registertion its show this programe is registed. but I can not use it as the pro version.
it is still have the Activate pro Version button on the down right side.
Please help.....