There are multiple versions of the game released so far.
Use this tool to open the .exe file and know which one it is.
You then have 2 options (buttons) with the software :
1) Patch Headers Only:
If your game is crashing a lot when you try to run it, use this to patch the PE Header and make it stable.
2) Headers + No Crosshair:
Use this to patch the .exe to remove crosshairs during the game.
Ammo digits will be moved on top of your lifebar.