For the BJCP styles, the only additional update is the provisional styles they released which is available as an add-on. Outside of the BJCP, the BA comes up with commercial styles on a periodic basis which is how they designate the groupings for the GABF commercial competition. These are made more to split up the entries and ensure more commercial brewers can have a chance to get a medal to advertise.
As for saving an additional style, I don't know of a way to save a new style from the recipe and not sure how the program would know which style grouping it would be saved to if the user has multiple style guides they are using.