I think you should ask Chris.�� I'm just a happy consumer.�� I don't know how it works, except that there's an automatically updated database accessible via a server than responds to the version info queries from images.�� I've asked Chris whether that server could be replicated on one's own machine (so that e.g. one can work without a network) and he says that,, yes of course this can be done.�� So this looks to me like a good scheme.�� But Chris is it's designer and implementor.�� Ask him...