<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 6.5.3

Error message:
Accesso alla memoria non valido.

Stack trace:
(00000603) DWMAPI.DLL.DwmIsCompositionEnabled
(0006246E) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(0041CE11) Vcl::Comctrls::TCustomListView::DrawWorkAreas
(003A3455) Vcl::Controls::TWinControl::WndProc
(0041AF67) Vcl::Comctrls::TCustomListView::Edit
(00204B78) System::Classes::TDataModule::GetChildren
(00015307) USER32.dll
(00015D45) USER32.dll
(0001FD52) USER32.dll
(0001FD78) USER32.dll.CallWindowProcW
(0053941F) Dragdrop::TDragDrop::~TDragDrop
(00204B78) System::Classes::TDataModule::GetChildren
(00015307) USER32.dll
(00015D45) USER32.dll
(00015DF3) USER32.dll
(00015E51) USER32.dll
(0000F107) ntdll.dll.KiUserCallbackDispatcher
(00016895) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.