All TurboCAD Mac owners who purchased their software after 2004 qualify for upgrade pricing. Pricing varies depending on your current version and level (ie 2D, 2D/3D, Designer, Deluxe, or Pro). To see your upgrade price, choose the TurboCAD Mac version 5 software you wish to purchase and click the “Add to cart” button. Once you enter your shopping cart, enter the first four digits (numbers and letters) into the box labeled “Promotional code” and click the “Apply” button. How to locate your serial number: Customers who purchased their software thought the IMSI/Design website can look up their serial number online through FindMyOrder.com If you purchased a physical copy of the software, the serial number is located on the CD or DVD sleeve. Alternatively, owners of TurboCAD versions 1, 2, or 3 can find their serial number in the “About” menu. Need Help? Call 1–800–833–8082 (M–F, 8am to 5pm Pacific)