I don't believe it is right I have to pay and upgrade just to be able to use your application again.
I have no need to upgrade to v11, v9 worked perfectly for my needs I simply don't have a installer for v9.
From your own FAQ page:
Q: When I enter the key I receive "This license key you have entered is not valid for version ..."?
A: The license you buy is valid for the current version only. It is guaranteed to work with any new version for 30 days after the purchase. After that if you want to use the latest SQLBackupAndFTP version, you can purchase an upgrade. To download the version that you own (and your keys), go to Resend page
The link given in the FAQ to the resend page produces a 404.