The latest version 4.1.1 has a lot of problems, it crashs when moving the mouse, it crashs while nothing is moved, it crash when rewake after some minutes of pause, but the shut down is running well for me. Only when it crashs it hangs sometimes - it doesn't work but also it doesn't shut off and the screen stays milky.
I exit out of the program only by clicking the X in the MS-Window, I never use the menue.
The shut down via menue-exit runs also fine. tested 2_time