I just enabled serial port redirection in the base image last week and apparently that was the issue, as WinSCP worked prior to this update. Thanks so much for sending me that link!
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
Faulting application name: WinSCP.exe, version: 18.104.22.16855, time stamp: 0x00000000
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0x80000003
Fault offset: 0x00cc0346
Faulting process id: 0x21c4
Faulting application start time: 0x01d719f4303d07bc
Faulting application path: C:\Program Files (x86)\WinSCP\WinSCP.exe
Faulting module path: unknown
Report Id: 2e45c566-07b4-4b4a-a98a-5ecdc1032fdc
Faulting package full name:
Faulting package-relative application ID: