Clicking this menu option will back up your database files to the "\KDB Backups" sub folder.
This is a standard folder created under the "CatTools2" folder at installation.
The .kdb files will not be over-written or appended, but each new save will create a new file, and the file name will be incremented using a numeric progression:
Backup-1, Backup-2, Backup-3, etc ... ...
Up to 9 backup incarnations are created. Each time a backup is done, Backup 1 moves to Backup 2 which moves to Backup 3 etc. Backup 9 is dropped off the end and deleted.