Re: Scandinavian letters äåö missing in 4.0.2 (FTP)?
Please try following: Switch your session to SFTP, go to SFTP tab, select "off" for "server does not use utf-8" and switch the session back to FTP.
See https://winscp.net/eng/docs/faq_utf8
See https://winscp.net/eng/docs/faq_utf8