Not sure about a plug, but mine had Dynamic and Dynamic Pro already available. (I think the TE comes with the plug pre-installed, perhaps.)
I haven't played with Dynamic Pro mode yet. Only had short spells in Dynamic to see if I can notice the difference - I can - but as it's been cold and slimy since I've had it and I've now gone over mileage for first service, I will need to wait until after service on Monday to have a play. After last weekend's lovely mild and sunny weather, looks like riding to and from dealer is goign to be more of an opportunity to test heated grips and seats rather than anything faintly approaching 'dynamic.'