Playlist Files
There is support for playing local music files (WMA,MP3,OGG and AAC).
To add a playlist file (M3U) or music folder go to File->Open in the main menu
and select the first button for playlist files and the second button for folders.
Or you can drag and drop folders and files from Windows Explorer.
There is also a context menu for other options.
You can also add or update media tags for each file (including cover art and lyrics).