Started up a saved file and the correct details appeared. I wanted to change the Project Origin point from Rear Left to Front Left. I clicked File: Project Edit: Origin and changed the Origin point. Clicked OK. My project disappeared and the project name was now . How did that happen? What should I have done to change the Origin?
Your Origin should have been where the machine Homes. You tell it where that is in the Device Settings window.
The way you did it looks like MillMage though you were starting a new project.