Online Documentation for SQL Backup for PostgreSQL
Backup source
At this tab you can edit the set of databases to create backup for.
Use the 
Select All or 
Unselect All buttons to select or unselect all the databases at once. The 
Invert Selection button allows you to reverse the database selection.
Server
Select the server to create the scheduled backup task for.
Databases
Edit the list of databases to create scheduled backup for.
