The maps I downloaded through the application following instillation of the 7W.apk are useless ....
They appear as 7WZ files in' 7 ways content' folder, but most of the roads are not joined up so are not navigable.
The UK England map, an OSM map as been corrupted and is useless.
The Great Britain/UK map from the list above unzips as four parts and are 7W files that the program does not recognise.
They should be 7WZ files.