Hi again
I did what you proposed, (right click > play. - shell integration was already enabled - and reboot), but with no effect.
Now only drag 'n drop works! "Play in Media Center", "Open", "Open with JRiver Media Center" and double click, they all open my playlists, (m3u8, m3u, mpl), in Album Order!
It is not the OS giving it in its own order, because opening playlists with other players, (Foobar2000, VLC, Windows Media Player, even JRiver MEDIA CENTER 31), works fine. I also tried JRMP 32 on Windows 10 and on Windows 11, and 4 different PCs. Allways the same problem. So there must be a bug on JRMP 32.
Eventualy, I am going back to JRMP 31, hoping that JRMP 33 will have this problem solved.
thank you for your time