Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
Your account appears to have been upgraded to the PRO version already. The BUSINESS badge is already visible on your account.
You can check the subscription information here: https://rankmath.com/my-account/subscriptions/
To use Rank Math PRO, you need to first download the plugin from your Rank Math dashboard. If you do not see the PRO plugin in the download section, please log out, clear the browser cache and log back in.
You can then download the PRO plugin from your Rank Math account dashboard here: https://rankmath.com/my-account/
After downloading the plugin, you need to install and activate it on your site. The PRO version is built on top of the free version to keep the plugins robust and lightweight. So you will need both of them to be installed and activated at the same time so the PRO version will work. We have a detailed guide on how to upgrade your account to PRO on your WordPress website: https://rankmath.com/kb/how-to-upgrade-to-rank-math-pro/
After installing and activating Rank Math PRO, you need to reconnect your website to Rank Math. You can also follow this guideline to connect your Rank Math Account: https://rankmath.com/kb/rank-math-pro-license-key/
Hope this helps, and please do not hesitate to let us know if you need our assistance with anything else.
Thank you for choosing Rank Math.