Proton Movies Folder Player Pro is a directory - centric musicmp3 player and is a more advanced version of its free counterpart.
It adds the following capabilities on top of free version:

- Priority updates
- Unlimited tagging allowing you to create multiple "playlists"
- Extended cross-fading functionality
- Ability to auto-delete tracks during playback
- Option to stop on power loss
- Option to continue playback for next folder after current folder finishes
- M3U support


Some of the other features shared between two editions:

- playing folder trees AND individual files within folders
- integration with Bluetooth headphones (and your car)
- integration with last.fm (via scrobbler)
- pauses during phone calls and navigation speech
- sequential and random play
- configurable settings
- Equalizer
- Double press headset button to skip track
- Search

Please visit http://folderplayer.com for feedback on problemsideassuggestions