resolve 17.1.1 delete all my old project backups?

So I just installed the latest 17.1.1 today and all of a sudden my project backups for each of my projects seem to be only like one day old or the very last backup. Before this upgrade if I needed to go back to a previous revision there seemed to be a wealth of different save dates I could go back to. This is terribly horrifying for me as I will often make many revisions that often get referenced much later. What the heck? did this new install literally go thru and delete all of my older automatic backups?!