Thanks for the info. My only still remaining question is with question (b).
Tapping gear, then Settings > Default View Mode, I get 3 choices: List / Imagelist / Thumbnails.
This does not allow me to open JRemote directly in > Audio < Genres, so the question remains:
When my JRemote starts, I have to tap "Audio", then "Genres". How can I automate this, so it goes directly to "Genres"?
Is there another setup menu which I missed?