Hi,
I have a legacy Arty, my machine was in inches. I contacted customer support through email and Mosiah was very helpful updated my software and converted it to metric via Team Viewer. I am in Australia so Utah hours are my sleeping hours and I did not have to be at the pc. The feed DRO? could not be changed and remained in inches per foot, I have not been at the machine long enough to work out if the numbers actually relate to ft or mm. I also asked him to change the tool change position to the centre of the bed but the same centre position of the fixed touch off pad ie y = +300 x = 50.? centre of touch off plate, if you know what I mean. I seems easier to change the bits over there and it still touches off ok when setting up the auto tool change.
Cheers