I don’t want FXsound interfering with the sound when I’m working on a project in FL studio or Reaper so I just go into the windows soundpanel, right click and disable the device, I can re-enable it when I’m done, and my focusrite is able to change between frequencies without any issues and isn’t locked to anything as the audio devices should now be freed up and not automaticly routing through FXsounds devices. disable both playback and recording devices to ensure you don’t have an issue like a microphone not working properly, both must be disabled to be sure.
hopefully this helps and you can reinstall and quickly disable when you need to 
takes me half a minute to do and really changes the dynamics of my studio headphones when I’m not working and just watching something 