Version 3.6.2 on Windows 8 Pro
I dragged an app to the end of the list of programs. Then I decided to drag it to an existing menu folder. After I released the mouse button to drop, the display of program items froze and clicking anywhere just produced a error sound. I then rt-clicked the start button and picked exit. the app exited but the image of the list of all programs remained visible. I then rt-clicked the desktop and choose refresh. that reset the screen.