Checkbox "remember password during session" checked, if it was checked at previous session

I prefer to type in password exactly once at start of each session,
so I use checkbox under password input.
But I forget to check the checkbox very often, so I need to type password again, if I want to edit file on the server.

I suggest to use state of the checkbox from previous session.
If the user likes to have the checkbox checked, he will have it checked always.

Enable Remember password for duration of the session option in the Preferences:
See https://winscp.net/eng/docs/ui_pref_security