License codes are required in order to run ZEMAX. Each ZEMAX key has a unique license code for each update of ZEMAX that is released. Under normal circumstances, each new ZEMAX Update download will automatically include license codes for all ZEMAX keys that have current support.

If your key is not eligible to run the current version, or you have only recently renewed your support and your license code is not included in the downloaded installer, you will see a dialog box like so:

If you see this dialog box, your copy of ZEMAX is correctly installed, and the key driver is working properly, but you do not have a license code that allows ZEMAX to run with the key that is plugged in. Take a screenshot of this dialog box (use Alt-Print_Screen) and paste it into an email to support@zemax.com .

Please do not phone for a license code! License codes are complex multi-character strings and cannot be reliably given over the phone. Emailing the screenshot of the dialog box to us is the quickest, most error-free way of getting your license code quickly.