The first step is to go to lightburnsoftware.com
At the top, click "Download and Trial" (or click here)
You'll see links for the current release of LightBurn. Download the version that matches your computer.
- Windows 64-bit - nearly all modern computers are 64 bit
- Windows 32-bit - some older systems might need this
- Mac OSX
- Linux 64-bit
When you've completed the download, you should see the file in your "Downloads" folder. On Windows and Mac you can just double-click the downloaded file.