Re: Does the Harmony 3 configurator have to match the version?
I actually don't think they need to. I say that because all of the menu items and the nodes you drag onto the Project Graph window are generated via Python scripts within the Harmony tree. That means that the MHC3 really just needs to be able to read the Python files and do whatever they say. The version of the plugin might matter if, for example, the devs add new Python functions to their API, but that would matter only if the Python stuff were part of the MHC3 instead of Harmony itself.
It wouldn't hurt to give it a try.