Autodesk has never released a free version of PowerShape (now often called Autodesk PowerShape Ultimate or formerly Delcam PowerSHAPE). It is a high-end, professional CAD/CAM hybrid modeling software used for complex manufacturing, mold and die design, reverse engineering, and additive manufacturing. Licenses typically cost thousands of dollars per year.
Would you like a step-by-step guide to setting up the FreeCAD + Blender workflow as a PowerShape alternative?