Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.6

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(00018BBA) KERNELBASE.dll.FindFirstFileA
(007E46BA) C4799_3
(007E6722) ____ExceptionHandler
(007E369C) __ExceptionHandler
(00045A86) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(0060D91A) _noise_get_heavy
(00602970) _random_ref
(0063A2E4) CoreInitialize
(007E2811) C4667_0
(00038ED0) ntdll.dll
(00038EA0) ntdll.dll

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.