Click in the top, right-hand corner of the window while pressing the SHIFT key.
Alternatively, you can exit all in the following ways.
•Press ALT + SHIFT + F4.
•Press ALT + SHIFT + X.
•Select Close All from the File menu.
•Select Close from the File menu while pressing the SHIFT key.
•Add the Close All button on the Toolbar, and click that button.
•Click the tray icon and select Close All from the menu.