This is not the new version of a previous plugin, it is a completely new one and it works in a different way.
On single post, page or cpt, just add the video url in JW Player box field for a single video. Use the address of a xml, feed, rss or php for a playlist (Premium version).
Next update will comes with another publish method for playlists.
More detailed informations are coming on this site, please stay tuned.