The nECY needs to first be upgraded to the latest firmware.
Then Navigate to the “System” menu and select the License tab. (See attached image, for example)
Then (with nECY f/w version 1.7 and up) if the nLight ECLYPSE or the computer is connected to internet. Select Import from Server. Otherwise, select Import From PC. (Contact Customer Care to get the license.) The license is now updated and nLight Explorer will be visible AND functional.