If you want to use ableton live to trigger MIDI to change the sound library.
Preferences >link MIDI >outport line6 hx stomp>track on and Sync on
Do not check input, Sync.
It will make hx stomp "Connection interrupred"
In Hx stomp, select Golobal Settings>midi/tempo> Temop select >global
Hx tempo will follow your live.
Good luck!