I had the exact problem with Paiute map for Utah. I followed the directions here...loaded My Trails...but still could NOT see the Paiute map! I then did what else was suggested...UNinstalled the Paiute map. Re-installed the map but CHANGED the directory to the Garmin directory, which is where the My Trails automatically downloaded. YAY...now both the My Trails and Paiute maps appear in BaseCamp!!!