I got a replacement Vivofit and I was able to pair it via my iPhone and now it shows in Garmin Connect.
I launched Garmin Express but the Vivofit does not show (only my Edge 800 shows).
I picked "add new device" and the Vivofit is found. Then it puts up the "Tell me about yourself" personal stats and asks for my existing Garmin Connect credentials.
Then I get the "We're sorry. There's a problem with our servers " message. From other posts in this forum I think that the issue may be something local rather than at the Express servers.
Can I add the Vivofit to Garmin Express?