The preview looks fine, but the laser burns everything at 100% power.
To remain the "top" performer after 30 days, you must buy a license. LightBurn uses a dongle-less system tied to your computer's hardware ID. You can transfer the license to a new computer up to 10 times per year.
When you first launch LightBurn, you have two options. The "top" experience requires a license, but here is the secret: