Missing Central Map Data

I have loved using Navigon for years, but the latest update has made it unusable for me. I originally purchased the US Central version as I live in Texas. I made an in-app purchase of US East a few years ago for a vacation trip I was taking. Everything was good. With this update, I can no longer access the US Central maps, even though the app namre is US Central. I only have access to the US East maps. Looks like i will be using my iGo app instead.

Stephen French about NAVIGON U.S. Central, v2.1