I'm finally trying my hand at the step guide all the way through, and I've gotten snagged on TexGen. I don't know what it means by "old" DynDOLOD files, because this is a fresh install of Skyrim (AE) and I haven't done anything with DynDOLOD yet. I have the modding folder set up correctly, and the pathways are all correct to my knowledge.
I've also checked the FAQ, troubleshooting, error messages, and not found anything that mentions this specifically. Anything that might come close to my answer... doesn't seem to work.