So BaseDeviceProfiles.ini is the defaults file and shouldn’t be updated. If you modified the settings, there should be a file in the Game/Config folder called DefaultDeviceProfiles.ini which should have your change in it. It will look something similar to the one in TappyChicken/Config/DefaultDeviceProfiles.ini.
Because of the way cvars work, the new value may not be getting written until you exit from the editor. Try exiting the editor after the change and re-launching it to see if that fixes the problem. If so, I’ll see if we can get a bug added as that one should get updated since it is only affecting a device profile and not the main cvar in the editor.
-Pete