I have had the same problems on 3.12. The map crashes as soon as I open it or try to navigate. Now i loaded 3.13, but before i started it i removed all my own custom POI and then it worked fine. If i put them back the unit stops working. I have used the function where you can have POI in folder/levels and there seems to be something not working with the custom POI:s. When I do some simple tests it seems to be the POI that I have created using POI loader and gpx files that are not working or if it has to do with special characters as Å Ä Ö in Swedish. The csv files that I have downloaded and used seems to work fine.