Hello Sir, Thanks for your using CADian. Please go to link - https://www.cadian.com/english/index.asp And then you find webhard information so that you can download the latest of CADian. Please update the CADian 2012. * PS 1) If you purchased CADian 2008 or less, not to install and execute CADian 2012 with your serial No. CADian 2010 and 2011 users can update to CADian 2012. * PS 2) If AutoCAD 2013 or 2014 dwg files, it takes some more time. Maybe 5 Months more. Regards, CADian