Well I buggerised around for several hours with the navfree app and it's definitely smarter than me. I cannot get it to plot a route from anywhere other than where I am, even with GPS switched off.
I tried plotting from Sydney airport to Nelson's bay, a trip we will be doing prior to heading off to the states, but it will only give me a route from home.
I have saved a route from home to a local shopping centre and will test the saved version next time I use the car, either tomorrow or Friday. It looks like you have to start a route from wherever you are at the time which is bloody frustrating.