FIRST OPEN THE STEAM CLIENT, THEN OPEN THE LAUNCHER! (or you get a CTD)

[DARTH VADER]

Why there is a CTD?
The CTD can be noticed before start, before a custom battle or before a campaign start but this has to do with Steam not liking other files in its folder. So before you open the DMN LAUNCHER you must have logged in to your Steam Client or restart your Steam Client and try again. When you press the PLAY button the Launcher sets all the files properly and the game starts. After a successful launch of the game, the mod files stay at their place so you may start the game from the official game shortcut and not use the launcher again (unless you want to change settings).

IN A FEW WORDS AGAIN!

FIRST OPEN THE STEAM CLIENT, THEN OPEN THE LAUNCHER!!!!!!!!!!!!!!!!!!!!!!!!!!!!
You forgot to open Steam before opening the Launcher?
Close Steam->Close Launcher->Open Steam->Open Launcher.

PS. The launcher saves your settings. So, unless you want to change the settings, you may never use the launcher again and play the mod using the official game shortcut only.

[DARTH VADER]

Bump