"Just a thought, but M3 is no longer free at DAZ, so this may be a indication of a new release."
Two things:

I doubt they would have left his name the same, like V4 - V4.1 has changed.

Go to Download.com, and search for DAZ..  Among the things you will find is a Figure Pack with the Bases for; V3, M3, Aiko, and Hiro.