I use "Bitvise SSH Client" (Tunnelier,Free) for this. it connects to real FTP Server and supports a local simple FTP Server for pspad on 127.0.0.1
I works with all SFTP and SSH connections. -- by HH <https://forum.pspad.com/read.php?2,70093,70100> PSPad freeware editor https://www.pspad.com
