Hi Mike
Once you've started Beyond with either your FB3 or QM2000 connected, navigate your way to settings/configuration. You'll see two checkboxes there, one for Enable QM2000 controllers and the other for Enable FB3 controllers. Make sure that both of these are unchecked.
Now, with both of those boxes unchecked, re-start Beyond and it should work without either of the controllers connected. Of course, if you want to use Beyond with either of the controllers in future just re-check the option you require and re-start Beyond.
Hope that helps
Regards
Jem