Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
We can see that your profile badge has already changed to PRO.
You can download the PRO plugin from your Rank Math account dashboard:
https://rankmath.com/my-account/
If you’re not able to find the option to download the Rank Math PRO plugin, please try to log out and log in again to your account or you can try in the incognito mode of your browser.
Once done, please have a look at this easy-to-follow guide to properly install and setup Rank Math PRO on your site: https://rankmath.com/kb/how-to-upgrade-to-rank-math-pro/
Let us know how it goes. Looking forward to helping you.
Thank you.