Thanks so much for the detailed response. I saw the plugin was update when i went back to it, so didn’t need to do it via Github download but thanks for that option!
This is a screenshot of the button setting options in the editor we’re using – it does offer option for CSS Class & ID.
In DS Style Settings I have selected Do Not Set Styles
The Button CSS ID in DS BUtton Settings is MyButtonID
But I’m not sure what the Class is – or if I’m even understanding this approach correctly. I feel I may have it back to front!