That’s the same link as I’ve already provided in my first post.
I wouldn’t call the plug-in experimental.
It works robust and stable (at least on Windows).
As I’ve explained longly and widely above, choose “Isolate center” to retrieve the vocals (+ drums and some residual music).
The results can differ heavily, depending on how the track was mixed in the first place.
The worst that you can get is a track that sounds the same as a simple mono down mix (menu Tracks > Stereo to Mono).
The result will be best if some instruments were panned hard left, the others hard right and the vocals in the middle.
Steve, are you sure you meant this topic? It is meanly about pseudo stereo and to a lesser degree about extracting vocals from a mono track - something that can’t be done satisfactorly (not automatically at least).
You meant perhaps this one:
Alex, please ask if you’ve got stuck somewhere - I’ve seen that you’ve asked for some links to get started.
For this specific plug-in doesn’t exist additional information other than provided in the presented links.
Hence, this is the right place to ask if something isn’t clear.