I assume we are still talking about Dinah Washington’s
I’ve recorded an excerpt and the effect works perfectly well, both with removal and isolation.
Try it with this:
All you have to do is importing it, select all (Ctrl+a or similar), call the plug-in and hit enter.
The settings should be “Remove Vocals”, Strength 1.0, low-cut 120, high-cut 9000 or alike.
Cheers
Robert