Whenever I start WinSCP and want to connect to a host that is not in my bookmarks, I get WinSCP.
Often the error "Invalid access to memory" is displayed.
* Start WinSCP
* Click 'New'
* Enter 'Host name' (192.168.212.73)
* Enter 'User name' (root)
* Click 'Login'
Saving the new host and then connect from the bookmark connects just fine.