@tonyk_av: 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 6.1.1

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(000220D9) TCustomScpExplorerForm::UpdateSession
(0008544F) ntdll.dll
(00072A01) ntdll.dll.KiUserExceptionDispatcher
(00057477) TScpCommanderForm::UpdateSession
(000BDBBD) TTerminalManager::ReconnectActiveTerminal
(000CEDFF) ShowExtendedExceptionEx
(00024F78) TCustomScpExplorerForm::ShowExtendedException
(000BF345) TTerminalManager::TerminalShowExtendedException
(00DFAB48) TTerminal::ShowExtendedException
(003BA26E) Vcl::Forms::TApplication::HandleException
(00214D98) System::Classes::_18201
(00044CB9) USER32.dll
(000357D7) USER32.dll
(00034D2A) USER32.dll.CallWindowProcW
(00074FBF) COMCTL32.DLL
(0007505E) COMCTL32.DLL
(00074D5C) COMCTL32.DLL
(00044CB9) USER32.dll
(000357D7) USER32.dll
(00034D2A) USER32.dll.CallWindowProcW
(004AFCAF) Dragdrop::TDragDrop::WndMethod
(00214D98) System::Classes::_18201
(00044CB9) USER32.dll
(000357D7) USER32.dll
(00034916) USER32.dll
(000346EB) USER32.dll.DispatchMessageW

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.