When I first read about device profiles the tutorials/documentation points to BaseDeviceProfiles.ini. Which you apparently can copy to your own projects config folder to overrule the BaseDeviceProfiles.ini from the Engine/Config in the unreal engine folder. Later I learned that there is window in the editor for managing device profiles (under developer tools). The lines I edited in the .ini file did not show up there.
So what is currently the correct way to set up device profiles?