same problem. Save as a playlist. Open playlist as XML file. All columns are then open and you can fill in all titles etc.. Re-save then next time you open the file as a playlist in Zulu the artist names etc., will show.
on the new version of Zulu it will only scroll through first 3 tracks until you buy the pro version for £20 odd ; it happened to me, and i bought it yesterday and main features are now available.