Re: Unable to connect to Openelec after update to 5.5.3
I can only guess that you have some firewall/antivirus application that blocks the new version of WinSCP from accessing a network. Try to disable firewall/antivirus and test again.
See also:
https://winscp.net/eng/docs/faq_connection_refused
See also:
https://winscp.net/eng/docs/faq_connection_refused