According to the tracker, this bug has been fixed, could you kindly post a download-link to Windows binary files?
I can email the link to you, if you register. Or wait few days. WinSCP 5.18.4 will probably be released the next week.
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
According to the tracker, this bug has been fixed, could you kindly post a download-link to Windows binary files?