Hi Jeanne -
Thank you so much for your response! I appreciate and fully understand that this should currently only be available for On Demand customers. One thing I can tell you though is I don't think it is enabled by default. Fortunately, this add-in wasn't needed, but I noticed that for two very recent On Demand implementations (14.2), I cannot find this add-in enabled or installed (in Administration > Studio > Content Add-Ins) for any of their environments (DEV / PROD).