I find editing the album.style to be too tedious (download the file, try to guess what item to modify, make a change, save, upload, repeat when failed).
So I installed the PC version instead in hopes I would be able to see the changes as I make them on my PC first, then export the file to my android, but alas - the album.style file doesn't exist on PC.
I did find the default_album.style file in the install directory, but changes to that file don't affect the map as it turns out.
Look for your user directory, something like: c:\Users\USER\AppData\Roaming\Navigator\14.0\album.style and note, that AppData is "hidden" directory (so you have to check "show hidden directory first)