First a little bit of flattery, your program is great and I like it very much. The ability to add to the maps via OSM is a bonus and some time ago meant that the navigator was always up to date.
However in the last eight (or so) months the updates are much less frequent for UK that is.
Some time ago there was suggestion on this forum that we could help with building the maps if that is too much for you. That idea was scraped, so I would like to ask if you could use .OSM files rather than .MCA.