Depending on your platform, the installation folder is usually found at:

Instead of downloading a potentially unsafe .txt file, you can easily create one yourself: Open (or any text editor).

Are you trying to fix a or just improve your frame rate ?

-availablevidmem 2048 : Manually sets the amount of VRAM the game "sees" (e.g., 2048 for 2GB). -windowed : Forces the game to start in windowed mode. -width 1280 -height 720 : Sets a specific resolution. -nointro : Skips the opening logos to speed up startup. Installation Paths

Paste the desired commands (see "Recommended Commands" below). Save the file exactly as commandline.txt .