You installed a 15-day trial of KeyShot 9. After the period ends, KeyShot blocks access. A license file upd (update) here would mean converting the trial .lic file into a paid perpetual license.

: Launch the KeyShot Network Configurator and stop the Manager service.

If you are updating a license specifically for KeyShot Network Rendering:

In the context of KeyShot 9, a license update might be required for several reasons. First, the user might upgrade their hardware (such as replacing a motherboard or network card), which changes the "Host ID" that the license file is bound to. Second, Luxion periodically updates the backend verification systems to combat piracy or improve license server connectivity for floating licenses.