Convert a file Oruxmap.db in a free and open file

Hello,
I use Orux on Android, and I am very happy. Thank you for your work. I have direct access to many maps compiled for OruxMaps (France). Now I would use these maps on my computer (Linux Ubuntu). Is it possible to convert an Oruxmap.db's file in a format used by software as QGIS on Linux? I tried to make it through OruxMaps-desktop, but in vain. Do you know another solution?
Thank you for your help
Peregrini

PS : Sorry for my poor English, my native language is French

it's good, I found this application : geoportail : to directly download the maps and works perfectly under Linux. With this software, formats of maps are free, open and readable by most GIS software (if it is not the case, it will be very easy to processed)
http://code.google.com/p/geoportail/