[propbeanie]

I would not recommend editing the registry for Silent Hunter. As you have found Arsenius, getting the video stream set correctly will work. Right now, with the ultra-wide, your game setting of 1920x1080 is off the screen to the bottom. To temporarily get around that, set the Main Menu, Options, Graphic Settings to "Windowed". Then restart the game. This will leave black bars to the left and right of the game "Window", but will allow you to reach the bottom and top of the game screen. You might also have to adjust the SH4.exe Properties on the Compatibility tab.