Do not panic. Follow these solutions in order. Start with the simplest (no data loss) and move to the most invasive (reinstallation).
Sometimes the routine skips because Lumion targets your computer's weak integrated graphics chip instead of your powerful graphics card. Open , then go to System and click Display . Click on Graphics Settings . Do not panic
Warning: Only do this if you trust the source. Mismatched versions can cause worse errors. Do not panic
Run the Lumion_Download_Manager.exe or the original installer package. Look for a Repair or Verify option rather than a clean install. Do not panic
Right-click the installer executable and choose .