Since version 0.4 is an older release, it is rarely hosted on official developer portals and is instead found on community-driven file repositories:
: Tools intended for PIN recovery are frequently used for unauthorized access. Always ensure you have permission to test any network you are auditing. Many modern routers disable WPS or implement "lockouts" after a few failed attempts to prevent these specific attacks. disable WPS on your router to protect against these types of tools? Search Results for "wps-pin v.0.4" - SourceForge wps-pin v.0.4 download for windows 7