The backup dialogue presents a somewhat simplified interface to the EnterpriseDB pg_dump tool. You can backup a single table, a schema or a complete database, dependent on the object you select when starting the backup tool.
pg_dump does not support all options for all backup file formats. Particularly, to backup blobs the PLAIN format can not be used. Also, a PLAIN file can not be interpreted, and can not be restored using EDB-Studio. The PLAIN format will create an SQL script that can be executed using the EDB-PSQL+. For standard backup and restore purposes, the COMPRESS and TAR options are recommended.
In order to use backup, the pg_dump tool must be accessible by EDB-Studio. This can be accomplished by having it locatable using the path, or by copying it into the same directory where the EDB-Studio executable resides.