Hello,
is there a mod to change the alarm-level.
I want to play RFG whit maximum green level or general no alarm.
To stop the constant EDF reinforcements.

I know there is one trainer in the net (+15Trainer v1.0)
But this one is not working, and the game is shut down.

Can someone help?

The trainer is probably not made for the current version of the game.

You may be able to do something with the table files but I really don't know.

If you are willing to start from the beginning then download xliveless to use your trainer if the trainer still does not work then you will need to find the pointer your self.

It's possible, but not quite practical to remove all EDF (i assume you mean in singleplayer). The reason being that certain missions require edf gangs to spawn. The nearest one can do is reduce some of the group's member count in squads.xtbl, so you only get a few puny edf after you at a time. I've done this many times. But actually i did it with the marauders as they are downright annoying.