You can only re-register the version(s) of BI that were released within a year of when you last purchased a license. Example... if you last bought your license in January of 2021 and BI was, at the time, v 1.2.3 and by the end of Dec 2021 they were up to version 1.2.12. Your license key will allow you to re-install & register a single instance of any of those versions.
Any chance you saved the installer from when you purchased? Do you at least know what version your were on?
[am not sure on the email i got from them says lite edition