Why do you Upgrade your CAD Application? 0 comments, 30/06/2011, by Guest/blogger, in Tutorial Require new features, file format support, increasing productivity, more. « June 29, 2011: Open Design Alliance Announces Teigha Version 3.5 Creo 1.0: Is Maintenance Support Worth My Bucks, Euros, or Yens with Creo 1.0? » Share