What is launch menu?

Launch menu is created to optimize your work, by decreasing number of mouse clicks when starting your favorite programs, folders, and other files.

It is faster than shortcuts on Quick launch panel, each menu item contains the icon and title.

The menu has two parts: left (Launch List) and right (System commands).

List of 'system commands':

-Start Control Panel
-Open one of logical drives (submenu)
-Open/close CD-ROM
-Empty Recycle Bin
-Reboot the PC
-Shutdown the PC

Plus, service commands:

-Edit menu... (to edit launch menu)
-Close menu (to close menu, if you don't know how to do it)

The right part of menu can be disabled, if you don't want to use it.
Just uncheck Show system commands in the menu flag on Menu page of Sigma Launcher options, and save the changes by pressing Apply button.
To enable this part of menu - set the flag, and click Apply.