just downloaded the Navigon my region app, and since I live in TX I need to get the central part of the U.S. So how do I download this upgrade.
Thanks, Charlie
From the app store you should have paid for and downloaded the "Navigon My Region Central".
If you purchased one of the other regions instead and you want to upgrade to get the central region as well you need to go to "extras" in the options/settings menu and purchase it.