https://winscp.net/eng/download.php WinSCP :: Official Site :: Download WinSCP 5.21 Download WinSCP 5.21 is a major application update. New features and enhancements include: SSH core upgraded to PuTTY 0.77. That includes support for rsa-sha2-256 and rsa-sha2-512 SSH public key algorithms and improved support for HTTP proxies winscp.net