I am trying to locate where the vod section is under the pvr client and I'm unable to find it do I need to update the client or is the videos on demand only in the addon. There aren't any videos on demand in the 500's

You must use the Stalker NFPS client or Stalker Plus to see the VOD section. For the Stalker NFPS search for Ninja Clairvoyance repo. You set it up the exact same way as the native stalker, but the NFPS version has a VOD enable button in its settings. Ley me know if you need further assistance.