I've just tried Maps but one big issue is that it can't be directed to a cache of already-downloaded OSM maps. In fact I can't get past the initial download sc

I've just tried Maps but one big issue is that it can't be directed to a cache of already-downloaded OSM maps. In fact I can't get past the initial download screen to do any configuration. I already have an 8GB card full of map data, I don't want to redownload. Osmand at least will open normally, just with a blank map area and I cam fidget about with it. Maps also has an unhelpful name for tryimg to search for bugs or howtos. Mapz or Mapapp would have been better.