Thanks for bringing this to our attention. I don't have a quick solution for you, but this is being tracked internally now and we'll take a look. One potential workaround may be to clean your band contacts as we've seen this issue on Windows 8 as well.
edit: here are more details
Can you please try the following:
1. Clean the band connector with a swab and alcohol. Pencil eraser will also work. Concentrate the cleaning on 2
nd from the outside gold connectors from both sides.
2. Quit the app, then reconnect the band to a known working USB 2.0 port directly(if using a hub earlier)
3. Does the band enumerate in the device manager?
