1 - Go to folder: C:\ProgramData\erwin\Data Modeler\Licensing
2 - Delete what is inside the Licensing folder.
3 - Try launching erwin again with your license code.
the system clock may have been set backward or to a different time than the internet time. The system date time must be in sync with the internet time. To set your computer clock to sync with an internet time server please type "Control Panel" in the search box in the Start Menu. Then click to open the Windows Control Panel. From there, scroll or use the search tool to find the "Date & Time" setting, and click to open it. Click the "Internet Time" tab and click "Change Settings." Please check the box that says "Synchronize with an internet time server" to automatically sync the clock.