Considering the fact that even the manufacturer of Klasse AIO isn't really known, I don't think you will have much luck finding that information.
I could very well be wrong, but I think even the so called reformulation has never been documented by the makers of Klasse.
The Klasse AIO I am using now doesn't seem to be any different than the Klasse AIO I was using 3 or 4 years ago. It's still a good product and one I am still using.
FWIW, I have used paint cleaners that cleaned better than Klasse AIO so if a really strong cleaner is what you are wanting, you may want to look at some others.
Charles