Good app with major flaw

I would like to give this app more stars. It has a good map and a lot of information and features. I like that I can save addresses on the map. HOWEVER, I have had to download the high resolution map (available once you purchase the app as opposed to the free version) twice and it still does not show up on my iPad when I reopen the app to use it. Each time it tells me to download the high resolution map. The whole reason I got this was so I would have a quality map available to me when I didnt have access to wifi.

islandjill about Paris Map & Walks (F), v6.0.2