: Create or log in to your Lumion Account and ensure your License Key is registered. This is often the root cause for users on older versions who missed the mandatory account tie-in.
Why this works: The .bin file can become corrupted by a sudden power loss or a crash. Renaming it forces a rebuild. lumion invalid license fix
If you see a message stating no license seats are available, the license might be "stuck" on another machine or a previous session that didn't close properly. How do you register a License Key on your Lumion Account? : Create or log in to your Lumion