Just replace the script with the new one.
You should see "Chord Region Player" button bottom right in Toolbar.
Or Action menu > Show action list > type chord region player > run.

You can try it with the plugin just add 4 bars for each chord you will be using for now.
Save the chord as SGU, Open > SGU to reopen it.
"Biab Plugin Chords" button or run script.
Don't create fills, I'm working on that now so it will play a fill when you hit the same chord again or automatically after so many beat counts.