Tried a Windows system restore, but that did not fix the problem.
So, either your Mojo has failed ...
Or Windows, and/or it's byzantine handling of USB and USB audio, has shat itself.
(Seriously ... it needs to re-install device-specific drivers just because you plug the device into a different port ...)
I say this as an ex-Microsoft guy (principal architect). I have no hard feelings towards MS, even worked directly for Satya for a couple of years, certainly made a fat pile of cash there, but there are somethings they do that just baffle me.