If PFES065 is essential for your business workflow, buying the official license (even at $500) is cheaper than the risk of downtime. If it is for personal learning, the methods above (edu license, legacy portal) are your safest bet.
If your specific PFES065 variant is a digital controller, the configuration software is usually provided as a free download on the manufacturer's "Software/Firmware" page. Ensure you have the correct USB-to-UART bridge to interface with the chip. Conclusion pfes065 full free
