A simple way to transfer site settings it to go to Manage > Generate Session URL/Code, select URL tab, check User name, Password, Initial directory, SSH hostkey and Advanced settings. Click Copy to Clipboard.
https://winscp.net/eng/docs/ui_generateurl
Then transfer the clipboard contents to the target machine. And there, just paste it on the Login dialog.
https://winscp.net/eng/docs/clipboard#url

I have added this to the documentation:
https://winscp.net/eng/docs/config#transfer

Hello all,

Is there any simple way to export just a single site manager entry?

Thanks in advance!