Deleting the Zombie Army 4 folder in AppData\Local and the emp.bin file in AppData\Roaming can sometimes reset corrupted configuration files.
Here’s a breakdown of what that refers to and what you should know: zombie army 4 dead war crackfix v2empress new
We do this for the challenge and the scene. If you like the game, buy it and support the developers. They deserve it. Deleting the Zombie Army 4 folder in AppData\Local