Workshop4 works fine in Windows 10.

This message is likely due to you having an old version of the IDE and upgrading to Windows 10 or after a Windows 10 update.

You can fix this manually by performing these procedures:

  • Open Registry Editor
  • Navigate to HKEY_CURRENT_USER\SOFTWARE\4DLabs\Workshop
  • Delete the entire Workshop folder/key
  • Reinstall Workshop4 using the latest installer