There is at least one bug in menu on this pretty cool new version.
I fill "Audiobook 1" and "Music" folders, then try to play music and… unexpectedly hear my audiobook
This behavior lies on menu — "Music" item look for /mnt/us/music folder while there need to dive more to get
real music 
Perhaps /mnt/us/music folder can use as a base folder and add subfolders from menu? It will look better and more "clear"… imho.
One more suggestion: dynamically create "player" submenu on player's start based on /mnt/us/music folder content.
Probably need to clean bookmark and progress files in case of absent folder but I think you will come up with something.
