NEWBIE QUESTION: 1F Post Processor in Carveco Maker

Hello all. A newbie question . . .

I’m designing my first project in Carveco Maker for my soon-to-be-delivered Woodworker Pro. I see two choices in Maker for the post processor labeled as OneFinity BB (inch) and OneFinity BB (mm). Do I choose the version that corresponds with my project (in this case, designed in mm) or does it need to correspond with some machine setting I’m not yet familiar with??

Generally it is to match the machine settings however there might be a G20 or G21 specified in the output that will set the machine to imperial or metric based on the PP you choose.

Thanks Derek - much appreciated.