FarigMaps uses an internal cache to store images of the online maps that have been used. All material that is browsed online, will aftterwards be available offline. If an image is available in the cache, it will not be retrieved from the Internet.
Otherwise, you can cache the map by area or by locus as you wish.
IF YOU DO NOT CLEAR THE CACHE, YOU WILL ALWAYS SEE THE MAPS THAT WERE DOWNLOADED FIRST.