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.
pop up box asked that I post this stack trace.
Stack trace:
(001DFAF2) Vcl::Stdctrls::_16614
(00E085E5) TMessageForm::Create
(00E0A0DD) CreateMoreMessageDialog
(000EF7D3) CreateMessageDialogEx
(000F0044) CreateMoreMessageDialogEx
(000F01BE) MoreMessageDialog
(000F1D0C) ExceptionMessageDialog
(000F1F8D) FatalExceptionMessageDialog
(000BE3CD) ShowExtendedExceptionEx
(00021D34) TCustomScpExplorerForm::ShowExtendedException
(000AD949) TTerminalManager::TerminalShowExtendedException
(00D8E974) TTerminal::ShowExtendedException
(0023EC5E) Vcl::Forms::TApplication::HandleException
(003A5978) System::Classes::_18201
(000406E9) USER32.dll
(00036AE5) USER32.dll
(0003541C) USER32.dll
(00034F3B) USER32.dll.DispatchMessageW