From the Edit menu choose Pack Database or click the Pack Database button 
in the toolbar.
Packing the database permanently removes all items that are tagged for deletion from the list. Use Pack Database to compact your database and rebuild the indexes. When the database is being compacted, the records that are tagged for deletion are removed, freeing up dead space.
Follow the steps below to Pack the Database:
From the Edit menu choose Pack Database or click the Pack Database button in the toolbar.
A warning will appear stating how many records are tagged for deletion and asking if you want to make a backup of the records. If you click Yes, a Save As dialog box will appear. A final warning will appear letting you know that the records will be permanently deleted from the list.