can't figure this out. One minute it says Mach isn't supported, then says it is with a plugin and then makes out like you don't need Mach at all anyway

i.e. It says their gcode interpreter runs on a PC and sends motion control commands to their board (i.e. what do I need Mach for then?) but then says you need an "application" to do this - I just don't get what their stuff is meant to do and what else you need to make it do it.