Would it be possible for the client to store things like wgaf.cfg, config.ini etc somewhere in the user's Library folder, rather than within the Vendetta.app package (~/Library/Application Support/Vendetta, perhaps)?

Mostly I imagine this would be useful for people with multiple users on one machine, and for the case where someone does not have write permissions to the Applications folder without authenticating as an admin. Also for keeping the config files safe(er) in the event that the user needs to redownload the client for some reason.

True, that would be more in keeping with Apple programming guidelines.

indeed, transferring my wgaf always feels like a clunky solution