To update maps:
1. Go to Menu > My maps
2. Click on the Update button to start downloading new maps.
3. Wait for the download to finish
Please note: You need to update the application via App Store at first. It is necessary to update all your maps, if you select to update only few maps, all other maps that you had downloaded before will be deleted. It is also very important that you don’t interrupt the update, because the update prompt will not appear again and you will need to remove and re-download all maps again.