Perhaps do you have any comment about this?:
Sorry, I've overlooked these.
I'm not sure, but shouldn't "Open Session in Putty" be disabled for FTP?
WinSCP uses telnet (not SSH) by default for FTP sessions.
I know that it's unlikely that it actually works. But it may for someone, so why do not give it a chance?
New FTP sessions inherit options from default session settings if it is SFTP type, e.g., tunnel options.
Yes. But the setting is not used for FTP session, right?
And it may be working one day: