Some authorized resellers offer services where they generate the manufacturing documents for you based on your free-version files for a small fee.
Students and teachers can often access steep discounts to learn the software legally. Better Alternatives to Pirated Software
If you are trying to decide on the best software for your shop, I can help. Let me know:
If the price of Polyboard is currently out of reach, consider these legal alternatives:
Offers a robust free tier for personal use with professional-grade CAM capabilities.
An open-source parametric modeler for those comfortable with a steeper learning curve.