The official way to access (and the latest version, 5.3) is through a 14-day free trial offered by the manufacturer . While some third-party community links claim to provide "free" full versions, these are often unauthorized and may pose security risks. Official Free Access
The latest version (Prokon 5.x or Sumo) looks different from the classic 5.0, but core modules like Frame Analysis and Steel Design are significantly improved. PROKON 5.0 Free Download