It is not the same game. Or even against the same player. It's a fresh installation of 4.5 Although 4.0 is still installed elsewhere on the same machine. I don't know how to uninstall it alone.
So, it is version 4.5
As to when exactly they appeared, I don't remember so it is kind of impossible for me to help on that.
Is it possible that the two versions conflict with each other although they are installed in different directories?
Also, the other player, Imp, said he has crews as well.