A friend had one of the first Max's out, and since it didn't match any of my pics...he called Frank.
ZProx just didn't look like it, BUT it was there(see first 2 pics).
So pretty sure yours does also.
Make sure that in VN , limit switches are turned on.
In TS (Tool Setup), make sure you checkmark the box "I have Z-prox"
That also changes the Z-Zeroing routine so that it double taps the plate,retracts to SB3 safe Z pullup and pauses,retracts to upper Z limit switch, then goes down .125"....MUCH better for installing dust foot then, and reasonably sure you wont hit material or clamps.
MUCH more reassuring when you know the machine won't top out, and will simply Stop if your setting are wrong
scott
Oh..ignore the other settings in VNpic...from this laptop that has never touched the machine.