Re: Four possible bugs and one suggestion
Looking better at WinSCP3.ini I see it keept old Bookmarks from deleted sessions [Configuration\Bookmarks...], SSH keys [SshHostKeys] and an ini session called [Configuration\CDCache]. Can this happened by updating from older program versions?
But these items are not associated with a stored session. They are associated with username/hostname combination (host keys are associated with hostname/port). So they are not deleted, if you remove the stored session.