@Lowlander - That's it
FoldersNode is the optimal solution. This allows you to select individual playlists and saves you having to deal with "Imported Playlists".
1. Under Folders, click the location of the exported playlists
2. Click on the desired playlist
3. Send to > Playlist > Send to New Playlist
4. New Playlist: rename
Source: FOLDERS

Result AFTER Send to > Playlist > Send to New Playlist

However, this method leaves traces:
This folder must be deleted again from Add/Rescan.

@Matrixmainframe - Revise your setting - see image:
