I have just updated Delete Empty Playlists to v3.0. The previous version would simply delete any empty playlists it found. But I frequently found that I wanted to keep a few, especially if they were Smart playlists with criteria that would just be a pain to re-create.
This latest version can, certainly, delete all the empty playlists it finds. But it can also delete just the ones that are selected in the list. Additionally, specific playlists can be isolated by filtering for specific text in their names.