Christopher, I have tried rebooting. Even unplugging the computer and rebooting and the SCs still don't come back up in Sonar! They work on everything else but Sonar. I have tried the unplugging the SCs from the USB ports trick but still nothing works but reinstalling from scratch.
I plan to contact microsoft and roland today about acquiring the download from them and backing it up on my drive. It just makes no sense to sell an interface and not provide a way to have a backup of the updated driver for it.
Proenza, the interfaces are designed to be used exclusively for hooking to the computer. They are not designed to be used as mixers. Although, it would be nice if they served a dual function like that. Maybe, drop that suggestion in someones email. Pretty good idea!