o delete the workspace. 

          <UL>
            <LI>Tools in the workspace are closed.</LI>

            <LI>If you made changes to a file that is not open in any other tool, a dialog will be
            displayed to prompt you to save your changes.</LI>

            <LI>The oldest workspace becomes the current workspace. If the deleted workspace was
            the last one, then the default workspace ("Workspace") becomes the current
            workspace.</LI>
          </UL>
        </LI>
      </O