When Aurora saves the game, it creates a copy of the two previous saves. The current save is in the Aurora.db file. The preceding saves are contained in AuroraDBSaveBackup.db and AuroraDBPreviousSaveBackup.db.
If you have a problem with the game and wish to revert to a previous save, you can delete Aurora.db then rename one of the save files to Aurora.db.
You can also create your own backup saves by creating a copy of the Aurora.db file and storing it outside the Aurora directory. To restore it, delete the Aurora.db from the Aurora directory and move your backup file into that directory.