*** Switching quickly between folders - Solved!

If you have tracks only from "Reggae" folder or you have all the phone memory tracks in your library and want to change tracks and listen, let's say, ONLY "Trance" folder: press "Folder +" icon (last icon from the bottom right corner) select the new desired folder (in this case "Trance") and select the simple"check" icon, NOT "square +" !....the library will be refreshed only with the track from Trance folder. In this case "Manage Library is uneusefull".

Note: library is the "Winamp Playlist" in Someplayer.