The transition to CamBam Plus 1.0 marks a significant milestone in the software's history, moving from the long-standing version 0.9.8 to a more modern platform. Here is the direct answer regarding the license key and the "good story" of its evolution. The CamBam Plus 1.0 License Key
There is an older, completely free version of CamBam available on their website. While it lacks the advanced features of 1.0, it is excellent for basic 2.5D milling. Open Source Options: Tools like (with the Path workbench) or BlenderCAM Cambam Plus 1.0 License Key