Device shows up as available in the ALL window, but click on it, the icon spins for a couple of seconds, and then the app shows nothing connected, or available. Latest app, latest firmware.
So, (no joy) (no joy) (no joy) (no joy) - repeated attempts
then I had an idea, and I switched on my new printer and mounted that again, THEN looked for the Tomahawk - THIS time it found it and all is well.