While many forums and YouTube descriptions offer links to "free downloads," these are almost never official. Diagbox is proprietary software owned by Stellantis. The "free" versions are typically or pre-installed on Virtual Machines (VMs) . Downloading these files comes with significant caveats:
If you are a professional mechanic, buy the official tool. Tax deduct it.
interface. If you have an older or "lite" interface, the software may not communicate with newer cars (post-2016).