I agree the name is a bit nitpicky.

I wouldn't mention it at all if not for the fact that a) it's unreleased, and b) it would match the similar change that was languishing half-finished in my working tree.
But I don't know that the feature is "unnecessary". It would be a
very nice-to-have thing for running a PortableApp.
Easy to turn into a batch/bash script, and also an improvement on the PortableApps.com method which currently copies the config dir to/from AppData.