Your license key (also called a CD Key) is required to activate SigmaZone software. Here are four ways to locate it.
If the software is still installed, open the application and select About from the product's menu. The license key will be displayed along with your name and company.
If you purchased a CD copy of the product (as opposed to a download) then look on the back of the CD Packaging. The license key should be displayed. Typically it is two or three letters, followed by the version number, and then 9 to 20 digits — for example: QXL17-1234-1234-1234-1234.
If you purchased online, your license key was included in the order confirmation email. Search your inbox for emails from SigmaZone around the time of purchase.
If your purchase was handled through corporate IT or a purchasing office, contact them to obtain your license key.