Getting updates for Sage 50 - 2021 version

SUGGESTED

Purchased Sage 50 - 2021 and, over time, it auto-updated from 2021.0 to a higher version of 2021

Had to reinstall the software and now I can't open the company file because it is saved in a higher version of 2021; whereas the install reverted to 2021.0.

Sage no longer provides a link to the update(s) and insists that we purchase a subscription; which we don't want to do.

Any suggestions?