I just got a QuNexus from my wife for Christmas and am having a blast with it both on my MacBook Pro and iPad. I tried the Ableton Live Remote Script installer (I'm running Ableton Live Lite 9 ) and it doesn't seem to work: enabling QuNexus as a control surface per the instructions that came with the Script installer doesn't let me control anything in Ableton. I am able to use the QuNexus as a MIDI keyboard input, so it is communicating with Ableton at that level at least.
I did some debugging (I was/am a developer and have used Python quite a bit) and the logs show the MixerComponent constructor call failing - apparently due to a change in the function signature. I made a quick change to remove the last 2 parameters in the call and the remote script no longer fails to load, but I can't be sure it's doing what it's supposed to - though I seem to be able to control Live with the QuNexus - play/stop, launch a clip, move the selector between tracks. I'm new to Ableton's scripting capability (it doesn't seem to be documented officially anywhere) so it's been a process of trial and error to get the script to initialize.
Do you have any plans to release an 'official' update to the Live Remote Script that fixes this issue?