Yeah, but they have a modified one. And Nargott (the creator of WGE) said something about using a modified .exe from 5.5, including for new classes. That's what I'm talking about.
It's a shame there isn't a universal modified .exe for all versions where the possibilities of all levels/artifacts/classes/skills, etc., are expanded. It would be amazing; everyone could add what they need to the clean core of the modified .exe.