How to make a rollback\\backup of saves? (Batman: Arkham Knight)

It seems like where the saves are found, even if it seems where the backup of these saves is also found. But how to do it? Tried to delete and change files, all to no avail.
I just have Bats stuck in one room, where the penguin's hiding place is and I can't get out of this location. And I got there with a lantern, without a quest. The door doesn't react at all./
Please help!