A free download is available. Progress WS_FTP Pro: A feature-rich commercial SFTP client for Windows, offering secure file transfer, encryption, scripting, and integration with cloud storage services.

If you need to share or transfer files between Linux machines, you have plenty of options. Here are some you might not have considered.

Copyparty turns almost any device into a file server that can be used using any web browser. GitHub - 9001/copyparty: Portable file server with accelerated resumable uploads, dedup, WebDAV, FTP ...