Doing some further changes,
Using the compatability guide found
[Please Register or Login to download file] and going off of the basis that my tomtom was running App 8.017, I downloaded the most recent stable update for my tomtom, Australia 880.3811.
I downloaded the Installer package for this version and ran it. After restarting my device several times, it still has the old map version on it. It still has not updated.
Any assistance that you can offer would be appreciated.