Free version contains only basic set of features (Aimbot, Wallhack, Misc) and is VAC detected due to public availability,
do not use it on your main steam account.
Current free version was released on 20th Jul 2014 and works with latest game version.
Instructions: Run while being in Main menu, join a server and press INSERT or F11 to open settings menu, use arrow keys to change settings.
If you like LMAOBOX you might like to get Premium version with all features.