IMSI/Design Matches AutoCAD LT 2010 Upgrade Pricing... And Offers Free Product, Too NOVATO, CA--(Marketwire - March 24, 2009) - IMSI/Design, maker of the #1 best-selling CAD in retail, announced today it will match AutoCAD LT® 2010 upgrade pricing on DoubleCAD XT PRO, as well...