If your license key isn't being recognized, the official forums suggest:

For many small hobby projects, the free version is perfectly usable without any cracking or illegal activity. It allows you to test every feature of the software legitimately.

40 sessions of unrestricted , fully functional use.

The file must be manually placed in the CamBam program installation folder. 📂 Installation & Usage To activate the software, follow these steps:

Essential for keeping the software running on newer versions of Windows. New Features:

Welcome to CamBam. CamBam is an application to create CAM files (gcode) from CAD source files or its own internal geometry editor. CamBam CNC Software CamBam CNC Software - Downloads

CamBam offers a generous trial period (usually 40 sessions) with full functionality. This is the best way to use the software for free legally.