Transfers editor configurations (=species selections).
Press the 'Transfer configurations' button of the 'ARB_MERGE' window to display the 'MERGE CONFIGS' window.
Select a source config in the left subwindow (which shows all configurations of the source DB) and press 'Transfer Config' to copy it into the target DB.
You may not overwrite existing configurations, instead you need to delete them from or rename them in the target DB.
To delete or rename a configuration, select it and use the 'Delete' or 'Rename' buttons below the selection list.