<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 5.7.7

Error message:
Invalid access to memory.

Stack trace:
(0000727E) TCustomScpExplorerForm::RestoreParams
(00046286) ntdll.dll.RtlRaiseStatus
(00046112) ntdll.dll.KiUserExceptionDispatcher
(00039F42) TScpCommanderForm::TScpCommanderForm
(001E0B32) Vcl::Forms::TApplication::CreateForm
(007912D7) _SafeFormCreate
(00002462) wWinMain
(007DEA01) C4667_0
(00062AB1) ntdll.dll
(00062A81) ntdll.dll

(0000727E) TCustomScpExplorerForm::RestoreParams
(007E08AA) C4799_0
(007E2912) ____ExceptionHandler
(007DF88C) __ExceptionHandler
(00046286) ntdll.dll.RtlRaiseStatus
(00046112) ntdll.dll.KiUserExceptionDispatcher
(00039F42) TScpCommanderForm::TScpCommanderForm
(001E0B32) Vcl::Forms::TApplication::CreateForm
(007912D7) _SafeFormCreate
(00002462) wWinMain
(007DEA01) C4667_0
(00062AB1) ntdll.dll
(00062A81) ntdll.dll

The problem happens rarely. I cannot reproduce it.