Fixed
All uninstalled, /Appdata/ removed, registry checked. There were a few entries, all removed, but the only one of interest was one in the muiCache. All the others seemed to just be pointers to both 3.4.1 and 3.6.3
Reinstalled 3.4.1 - all OK. Let it update to 3.6.3, all still OK (files created under firmware 9.5).
Rebooted, checked again, all OK, map and sensors working.
However, the 402 will play on both 3.4.1 and 3.6.3 but with no map or sensors.