ArtiosCAD has moved from dongle-based licensing (i.e. Sentinel or Elan licensing) to activation-based licensing (i.e. Flexnet licensing) in 2009. As of January 1st, 2016, the ArtiosCAD dongles will no longer be supported.
Please refer to this Knowledge Base article
to read more, the article outlines the ways you can return your dongles and move to the activation-based license system. (You can read more about returning dongles