No I haven't tried earlier version of Navigasi. I first downloaded the Garmin version of Indonesia, but it was extremely slow route calculating, so i tried the Navigasi 2.58 it was very fast more detailed but upon zoom or even during drive simulation the roads would disappear, although it was the only map selected from MY MAPS under settings on my 3790T. I did not understand why Navigasi works fine under Mapsource when zooming it, but not on the Nuvi itself. Then i found some information regarding Traffic trends, i switched it off, and the Garmin version of indonesia became lightning fast so i guess i will use Garmin map instead of Navigasi for the moment.