"Mpmaster for X2 MR2 - the exact same post as the X2 post above except the coolant codes are controlled by the post rather than the Machine Definition"
This is what it says on Mastercam's site. My Mastercam X2 is above MR2 Iirc, though not sure where to look to find out. I remember having to know that when I installed it as the Dongle only works to a certain MR.
I can download the previous one for X and above if it matters.