Lumion Invalid - License Fix

How to Fix the "Invalid License" Error in Lumion Getting hit with an "Invalid License" or "License Key is Invalid" pop-up in Lumion can bring your architectural visualization workflow to a screeching halt. Whether you’ve just upgraded your software or are moving to a new workstation, this error is usually a communication hiccup between your computer and the Lumion activation servers.

Step 2: Verify your Login Credentials (The "Duh" Check)

Lumion separates the software license from the user account. lumion invalid license fix

You will see a file named Activate.cfg (or similar .cfg license files).

Delete these files. (Do not worry; Lumion will recreate them cleanly).

Go one step deeper: Navigate to %PROGRAMDATA%\Lumion\License\ (if it exists) and delete everything inside.

Bonus Registry Clean (Advanced):

Lumion – Troubleshooting “Invalid License” Error

Applies to: Lumion 8, 9, 10, 11, 12, 2023, and later versions
Issue: Lumion shows “Invalid License,” “License Not Found,” or fails to activate despite having a valid license key. How to Fix the "Invalid License" Error in

Step 7: Registry Wipe & Reinstall (Nuclear Option)

If none of the above works, the Lumion installation registry is deeply corrupted. You will see a file named Activate

: If the key is not showing in your dashboard, use the "Register a License Key" button and paste the key exactly as it appears in your "Getting Started" email. 2. Account and Connection Fixes Sign Out and Back In

If you are seeing an "Invalid License" "License Key is not valid"

6. Contact Lumion support (last step)

If none of the above works, your license might be blocked or expired.

Step 2 — Run Lumion License Tool (Windows)

Close Lumion.
In Windows, open the Lumion License Tool (search Start menu for “Lumion License”).
In the tool: