Has this happened to you? You dragged the window over to the far right of the screen it has disappears. When the application is started, the window does not open in the main screen but appears minimized on the Taskbar. Even a right click the window to maximize will not open the app.
Hold down the Alt key and tap the Tab Key. When you see the desired window, let go of the Alt key.
Hit M and then use the arrow keys to get the window to the right spot.
Hit Esc when it's near the right spot.
Now drag on the edges of the window to size it. (do not use the Maximize button)