Hi there, Ada! Thanks for getting in touch.
Good question. You can grab the latest version of PRO right here on this site by heading to My Account > Downloads, and downloading the latest version from that screen. Once it’s downloaded, you can log into WordPress, deactivate and delete the old version, then upload the new one using the “Upload Plugin” option. These steps are explained in greater detail here in this tutorial.
Note that you can activate automatic updates in the future by following the steps in this tutorial.
Does this help get you running in the right direction? Please let me know. 🙂
Cheers!
Geoff