# 127.0.0.1 license.lumion3d.com
Lumion 2023 moved to a subscription model. If you have a legitimate subscription and still see this, a third-party "optimizer" or firewall might have altered your hosts file without your knowledge.
Look for any lines containing the word . These typically look like: 127.0.0.1 backup.lumion3d.net 127.0.0.1 license.lumion3d.net
A: No. Windows and macOS require the hosts file for essential localhost mapping. Deleting it can break network services. Only remove the Lumion-specific lines.
Are you using an or a perpetual license , and did this error appear immediately after a recent Windows update? How do you resolve antivirus and firewall problems?
Lumion 2023 Host File Entries Detected Exclusive !exclusive! 📥
# 127.0.0.1 license.lumion3d.com
Lumion 2023 moved to a subscription model. If you have a legitimate subscription and still see this, a third-party "optimizer" or firewall might have altered your hosts file without your knowledge. lumion 2023 host file entries detected exclusive
Look for any lines containing the word . These typically look like: 127.0.0.1 backup.lumion3d.net 127.0.0.1 license.lumion3d.net lumion 2023 host file entries detected exclusive
A: No. Windows and macOS require the hosts file for essential localhost mapping. Deleting it can break network services. Only remove the Lumion-specific lines. lumion 2023 host file entries detected exclusive
Are you using an or a perpetual license , and did this error appear immediately after a recent Windows update? How do you resolve antivirus and firewall problems?