How do you release a Lumion License Key? Lumion Support Center August 24, 2018 11:48 Updated Follow Please see this Knowledge Base article. Related articles How do you release a Lumion License Key? How do you resolve a 'Your License Key is invalid' error? How do you resolve errors, crashes and glitches in Lumion? How do you resolve a 'GPU device instance has been suspended' error? How do you resolve anti-virus and firewall problems?