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.
Stack trace:
(00416660) Dirview::TDirView::DDChooseEffect
(000624F6) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(00407E4B) Customdirview::TCustomDirView::DDDragOver
(0042BF14) __stdcall Dragdrop::TDropTarget::DragOver
(00132D1A) ole32.DLL
(00132E9D) ole32.DLL
(00109F87) ole32.DLL
(0010A43C) ole32.DLL
(0042D53F) Dragdrop::TDragDrop::ExecuteOperation
(0040501B) Customdirview::TCustomizableDragDropFiles Ex::Execute
(006568CE) TUnixDirView::DDDragDetect
(004056C4) Customdirview::TCustomDirView::CNNotify
(0024A765) Vcl::Controls::TControl::WndProc
(0024F2A9) Vcl::Controls::TWinControl::WndProc
(002931D7) Vcl::Comctrls::TCustomListView::WndProc
(0024F40F) Vcl::Controls::_17076
(0024F2A9) Vcl::Controls::TWinControl::WndProc
(0024E8F0) Vcl::Controls::TWinControl::MainWndProc
(0037326C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(00015DE3) USER32.dll
(00015E41) USER32.dll
(0000F117) ntdll.dll.KiUserCallbackDispatcher
(000186C0) USER32.dll.SendMessageW
(0002B06D) COMCTL32.DLL
(000D0845) COMCTL32.DLL
(000A207A) COMCTL32.DLL
(000A10E2) COMCTL32.DLL
(0002EE7B) COMCTL32.DLL
(000152F7) USER32.dll
(00015D35) USER32.dll
(0001FD3A) USER32.dll
(0001FD60) USER32.dll.CallWindowProcW
(0024F3BA) Vcl::Controls::TWinControl::DefaultHandler
(00406F22) Customdirview::TCustomDirView::WMLButtonDown
(0024F2A9) Vcl::Controls::TWinControl::WndProc
(002931D7) Vcl::Comctrls::TCustomListView::WndProc
(0037326C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(0001FD3A) USER32.dll
(0001FD60) USER32.dll.CallWindowProcW
(0042CA7F) Dragdrop::TDragDrop::WndMethod
(0037326C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW
(00416660) Dirview::TDirView::DDChooseEffect
(000624F6) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(00407E4B) Customdirview::TCustomDirView::DDDragOver
(0042BF14) __stdcall Dragdrop::TDropTarget::DragOver
(00132D1A) ole32.DLL
(00132E9D) ole32.DLL
(00109F87) ole32.DLL
(0010A43C) ole32.DLL
(0042D53F) Dragdrop::TDragDrop::ExecuteOperation
(0040501B) Customdirview::TCustomizableDragDropFiles Ex::Execute
(006568CE) TUnixDirView::DDDragDetect
(004056C4) Customdirview::TCustomDirView::CNNotify
(0024A765) Vcl::Controls::TControl::WndProc
(0024F2A9) Vcl::Controls::TWinControl::WndProc
(002931D7) Vcl::Comctrls::TCustomListView::WndProc
(0024F40F) Vcl::Controls::_17076
(0024F2A9) Vcl::Controls::TWinControl::WndProc
(0024E8F0) Vcl::Controls::TWinControl::MainWndProc
(0037326C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(00015DE3) USER32.dll
(00015E41) USER32.dll
(0000F117) ntdll.dll.KiUserCallbackDispatcher
(000186C0) USER32.dll.SendMessageW
(0002B06D) COMCTL32.DLL
(000D0845) COMCTL32.DLL
(000A207A) COMCTL32.DLL
(000A10E2) COMCTL32.DLL
(0002EE7B) COMCTL32.DLL
(000152F7) USER32.dll
(00015D35) USER32.dll
(0001FD3A) USER32.dll
(0001FD60) USER32.dll.CallWindowProcW
(0024F3BA) Vcl::Controls::TWinControl::DefaultHandler
(00406F22) Customdirview::TCustomDirView::WMLButtonDown
(0024F2A9) Vcl::Controls::TWinControl::WndProc
(002931D7) Vcl::Comctrls::TCustomListView::WndProc
(0037326C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(0001FD3A) USER32.dll
(0001FD60) USER32.dll.CallWindowProcW
(0042CA7F) Dragdrop::TDragDrop::WndMethod
(0037326C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW