Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
You can login to your Rank Math PRO account https://rankmath.com/my-account/ using the email address used to register. You will find the Product Downloads in the Dashboard.
If that did not work, please revert to us a copy of the receipt from FastSpring.com so we can locate your account? You can add them in the designated sensitive data section

It is completely secure, and only our support staff has access to that section.
Thank you, and looking forward to your update.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.