I’ve just released version 188.8.131.52 of the application.
The application allows you to download tiles served by google maps and openstreetmap to your harddrive and then view them offline, thus without an internet connection.
Google changed the base URL for the map-tiles which made the previous version unusable.
People with programming knowledge could change the code, but those using the binaries could not use the application for map-tiles.
You can get it at the Offline Maps page
That problem has now been solved.