The main differences in the latest OS are new and improved graphics, as well as some additional items such as:
# The actual location is shown as an arrow in a circle.
# The destination is marked with a checkered flag.
# Voice guidance has more words and provides clearer directions.
# Now you can avoid a trouble spot on your route to a destination.
# Main roads are now shown at all times for enhanced visibility at a glance.
# Some graphics changed to enhance visibility at a glance… including icons.
# Map positioning in “Travel Direction” can now be selected in scales up to 100 miles
# Disable point of interest icons is now selectable as on or off
See more info at
http://www.xoutpost.com/navigation-sy...-released.html
The dealer should upgrade you for free (especially considering the original dealer failed to do the upgrade from that original "temporary" release), although many don't seem to have a clue about this sort of stuff.