Maemo Mapper crashs quite frequently like when my old gps was out of range/powered out. I've bought a new GPS reveiver and maybe because I set it running at 2 or 5 Hz frequency, Mapper is very unstable : approximatly every 10 mn it crashs/closes, even without touching it. So I know well how to keep my settings : just after I start a trip, I save the route into a file(to be secure), and close Mapper intentionnally. Mapper saves the current setting and I could relauch it without to be afraid : if it crashes, I relaunch it and it restore my start-trip settings/bluetooth connection.