Downgrading is not recommended because newer Autodesk products require the licensing API version 9.x. However, if you must roll back to 9.0.2 for compatibility with an older network license server:

Better alternative: Contact Autodesk support for a compatibility patch rather than downgrading.

After installing version 9.0.3.46, confirm it is active:

To verify the exact version number:

If you see an older version (like 9.0.1 or 9.1.0), the upgrade did not apply. You may have a newer version installed that supersedes 9.0.3.46—in that case, no action is needed.

| Problem | Solution | | :--- | :--- | | Installation stuck at 95% | Kill LMS.exe processes, then retry. | | Error 1603 | Corrupt Windows Installer. Run Microsoft msizap tool. | | Service won't start | Check port 2080 (default). Change in adskflex.opt. | | Detected as "Unknown Publisher" | Ignore—Autodesk forgot to sign this minor build. Verify SHA-256. |

If the standard update fails, perform a full cleanup:

  • Restart your PC.
  • Run AdskLicensingInstaller_9.0.3.46.exe as Administrator.
  • Reboot again.