On first launch:
Version 1.6.03 is the recommended release for users running older macOS versions (10.11 or newer). Imaging Adjustments: lightburn 1603 portable
If you need to test new versions like 1.6.03 without losing your stable setup, you can manually move installation directories to keep multiple versions side-by-side. Performance with Portable Hardware LightBurn Software On first launch: Version 1