At first I could get the device to sync after upgrading to V2.0 on the pc . Another day, another a try, and the sync worked, except it overwrote the map already present. Then when booting SD mobile there is a message saying 'no maps installed' or words to that effect. Fortunately, I had a back up of the SD files from previous version, so I copy across the file that seems to be the map data file. Re-boot & the map is there, except it no longer shows any terrain. The airfields, airspace, dots for spot heights (no figures) are there, just no ground at any zoom level!



Have I missed a file somewhere or what?

OK, I'm part way there. Because it was a fresh install, it no longer knew which com port to use. And because it didn't know where it was in the world, it didn't know to load the chart.



However, what about these .dem files? Is the terrain now supposed to be in the skydata or not?