If you click the filter button before searching for anything you get an error.
Straight from loading LB i mean, if you've previously searched for something it doesn't happen.
If im understanding this correctly, if you get this DSHidMini driver then DS4Windows will recognize the ps3 controller and you can then emulate a DS4 or X360 (but windows wont see it as an X360 controller allowing you to connect them all).
Maybe?