Log in to the the 'setup.pl' administrative interface, using your ledgersmb database admin user (usually "lsmb_dbadmin" or "postgres"). The default address for setup.pl is http://localhost/ledgersmb/setup.pl.
There are 2 buttons:
- Backup database (parts, customers, accounting records, etc)
- Backup roles (your login accounts and rights)
One creates a backup of the content of your database. The other creates a backup of the roles.