Update

Rescans the current directory branch completely

Automatic Updates

Allows you to turn automatic updates on or off for the currently selected scan. If automatic updates are turned on TreeSize Professional keeps track of the Windows change notifications and updates the changed folders. It will also update the size of a folder if it gets listed on the details sheet. If you don't want the size information to change after the scan has finished, you should turn off "Automatic Updates".

Expand

The Expand submenu equals the one in the context menu.

Remove From TreeSize

This menu item will remove the currently selected scan from the view.