Copy this JSON file to
~/Library/Application Support/cura/3.6/definitions/monoprice_ultimate.def.json on macOS (note the Cura version in the path). It'll list a new printer (Monoprice Ultimate) that inherits the Wanhao Duplicator 6 profile but with the correct acceleration/jerk values (at least the defaults for mine).
This will improve the accuracy of time estimates (for example, a Tito head estimated 4hrs without this change, and 7:22 with it - which looks about right given it's 55% through the Gcode after 4:10!).