Thanks for all the help with Now Playing so far, i've just launched it on the Play Store here: mod edit
I'll continue to post betas of upcoming features here, and will keep looking at the thread for FC's/Bug fixes/feature requests.
Thanks for posting about this, I'm the developer. I'll do a global XDA post once i get to 10 posts and it allows me to post links!
The folder browsing option has been asked for several times but developer has never given any output yet. I don't think he is going to implement the feature, sadly.
It's quite a large feature to implement. It won't be ready for the May 1st rele...