Hi Graham, Does your machine have the DSP Controller? If so, it should be ready to go out of the box.
When you start the machine the DSP Controller should light up and display the message " Go to Home? ". Press the OK button or the Home button, as the message is a command rather than a question. All operations must begin from the Home position.
Regarding the Post Processor, it is probably G Code arcs mm with .tap or .nc extension. You probably should confirm this with your machine supplier or maybe Vectric Support.
Rocket.