To see your music fro the file browser you can go into settings>general settings>file view> show files> all
Just browse to your music files from there but if they are not showing with the default settings they may not be supported and therefore may not play.
As for the database not initializing i found that if you make ANY settings changes (using themes, changing colors, fonts etc.) before initializing then the database will either not initialize or take a really really really long time. If you just initialize it from the start it only takes about two or three minutes for me...