Can't add files to playlist on W10X64

[falenone]

Hello. I've been using Windows 10 for a while and found out yesterday that I can't just drag music to playlist window. Nor have the "Add to Xion playlist" I tried to remove the windows media player entries from right click menu. It didn't bring Xion's stuff there either. I have ran Xion as admin, I have the context menu options set, I have set all the defaults for Xion. Still can't drag anything to playlist.