Track numdering format according to number of track in a playlist
If a playlist contains 1-99 tracks then track numbering format is 01, 02, ...99. If playlist contains more that 99 then formnal would be 001, 002, ...xxx
You can test latest build with this feature at
http://www.mediahuman.com/files/new/YouTubeToMP3.dmg - Mac OS
http://www.mediahuman.com/files/new/YouTubeToMP3.exe - Windows