Hello Sir, 1. We have announced CADian 2012 on Oct 1, 2012. Please let me know your CADian serial No. by email. We will inform a LINK so that you can download CADian 2012 as soon as we get it. 1) Install CADian 2012 at first. 2) And then remove CADian 2010 (Or less) if it""s ok with CADian 2012. * You can use BOTH CADian 2010 and 2012 at the same PC. 2. It""s recommended to set to higher system specification if you need to use CADian 2012. Best specification : - Window 7 64 bits - CPU i5, RAM 8Gb if i7 and 16GB possible. Regards, CADian Helpdesk