Allen & Heath iLive Mixer Firmware 1.91

Fixes:
- In rare situations the TouchScreen could freeze for a while after selecting FX and recalling large Scenes.
- Adding channels into a Gang would not update in Editor.
- IEM or Wedge monitor select not working in Editor.
- MIDI control of stereo Auxes in Editor would not update some controls.
- Channel selection in Editor was slower than it was in previous version V1.83.
- With an MMO card fitted to Port B of the modular surface, the audio including that mapped to Aviom could be distorted and not correctly routed from the Port A link CH33 to 62.
- Plugging a ME-1 directly into ACE card Link 2 could result in the Link 2 Error indicator remaining on.
- Can select but unable to deselect Aux mixes using SoftKeys when there is no Main mix configured (monitor application).
- Sometimes the TouchScreen PEQ curve would not redraw correctly when changing channels.
- Several other minor issues also fixed