If anyone is using this feature, please download again and replace the M20040.txt macro with the new one. I have just detected a bug, which may result in that your probe will be crashed into the work piece if you are probing the outer centre of an object, using the "X, Y Outer Center" button. I don't think many people use that button, but be aware of the problem.
What happens is that after probing in Y direction the probe is Y centred and moved towards negative X but the movement is only half the distance of the Probing size value when the probe is lowered. This is now corrected in the new macro.
Sorry.