I double click on LaunchIW4M as usual and the cmd prompt flashes, disappears as usual but afterwards the console doesn't appear as it should and nothing is showing in task manager.

 

How to fix this?

Do you see a iw4m.dll in your folder and DB.Network.Indigo.dll or so?

Delete .dmp files start it and upload the new .dmp file

Try copy/pasting iw4m.dat and renaming it to iw4m.exe and see if that works correctly (temp fix anyways).

Delete caches.xml and start LaunchIW4M.exe again.

If it still doesn't launch, try disabling your anti-virus and try again.