This is a follow-up to my post above.
I uninstalled the USB Host Controller, then pressed the PC power button, which put the PC to sleep. So I pulled the power cord. During this time the FM3 was still powered up. When I rebooted I regained control of my mouse and keyboard, but the FM3 was still not recognized. So this time I deleted the USB Root Hub, pressed the power button, turned off the FM3, and pulled the PC power for 10 seconds. Then I booted the FM3, and when it was fully booted I booted the PC. Since I had screwed around with the Port setting in FM3-Edit I had to go back and reselect the Fm3, but I normally do not need to to this after this procedure.