I downloaded the Grimefigter, but I can’t connect to the wifi when it is running. I guess it might be because I always have to enter ID and password, but Grimefighter offers only password. I don’t have any other means to connect to internet or possibility to change any internet settings.
If GrimeFighter is not working for you, you can ask for a refund.
https://forum.avast.com/index.php?topic=154831.msg1172746#msg1172746