I am trying to prepare for a US road trip. I have gone to download to get the offline maps for the states I am visiting and many are simply not there - I have bought the world maps (ages ago) and other states and countries are there and downloadable. I need Colorado for example and it simply is not there (oddly in Cities, Denver is there. It may simply me being thick, but this seems very odd. This is on IOS by the way. Everything else seems fine. Any thoughts on the issue or potentially what I am doing wrong?