Default SoundHound, stay alive, and favorites?

I installed Soundhound on my Gear. Anybody know if it's possible to map the double tap for it to automatically search? It seems like you can't add any apps that aren't included in the ROM install.

How can I delete the favorites on the Gear manager on my Note 3? I can reorder and add, but can't find how do delete.

How can I extend how long the screen stays on before it goes off?

Also, I'm on Null 17.

Many thanks!