We highly suggest that you backup your data BEFORE you begin any work in eAdventist Tools. Not doing so may mean a lot of re-editing and/or data entry if you do something you don't mean to!
The backup function works as it does in the main CMD, and it will send your backup to the same place defined in CMD. We suggest that you always use the internal format backup when running a backup, but you are free to use the zip backup also if you wish.
Having backups is the only way to get rescued if something goes wrong. Please backup before you start!