First usable MapViewer version
With this release it's possible to use this app to view maps in closed cycle.
On first run, after opening Casc (File -> Open Casc Storage), update the database (File -> Update database).
When asked about "downloading DBD" files, click yes.
After this sqlite database that this app uses will be imported from DB2 files in Casc and Map list will become available.
To open map click (File -> Open Map Selection), change the size of the window, select map in the list. If it's ADT map, change zoom and click on desired point on map. After coordinates will popup, click ok to load the map.
Happy exploring