The ImageCapture capability is what's probably causing the dashboard app not to detect the Blink devices. It's because the app tries to auto-detect every device to use the right device type and it's looking for ImageCapture before Blink. I also had a bug in the app which didn't let you change from the Image device type to Blink so you couldn't manually do it either.
I've already fixed it and it'll be in the next version!
