Enabling DMX In
Menu > Settings > DMX Settings > DMX In
It should auto see your Enttrex DMX Pro. Press Connect
DMX input channels are set in this windows DMX Input settings tab
Monitoring DMX signal
Menu > View > Show DMX monitor
A new black bar appears below the main matrix of effects buttons.
DMX input channel levels are shown as small green bars with channel 0 left most.
There is also: Menu > Settings > DMX IN state monitor