I have 3 recommendations:
1. When in the folder tree window I load a directory, it scan all subfolders too. I’d prefer an option to scan only the selected dir without subs
2. Refresh button for the editor window that could refresh the current playlist
3. Allow files to be moved/copied between folders (I cannot use the basic Windows hotkeys, e.g. Ctrl-C, Ctrl-V, even the Del button doesn’t work for deleting files)