I've had both of these issues myself.
1. The MM800 issue may be caused by another RGB software overriding it. In my case, it was the Mystic software for my MSI Motherboard that was hijacking my MM800. Turn off the SDK option in iCue settings, and it should resolve it.
2. Just encountered this issue today with the ST100, which is how I found this post. Unfortunately, when I close and re-open iCue, the ST100 still doesn't show up, so I have to completely restart my system. Guess I won't be attempting to update it any time soon. :sigh!:
