@cthierry: Thanks for your feedback.

Hello Martin,

As a matter of fact, I downloaded the application again and then re-installed over it and everything went back to normal. Thanks for taking the time to read and reply.

Sincerely
C.Thierry

@contact: 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 6.3.3

Error message:
Accès mémoire invalide.

Trace de la pile :
(000018C6)WINMM.DLL
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(00001F31) WINMM.DLL.PlaySoundW
(00015A6E) WINMM.DLL.PlaySoundA
(004E1BF2) Tb2item::TTBCustomItem::CreatePopup
(004E1CE9) Tb2item::TTBCustomItem::OpenPopup
(004E1DD5) Tb2item::TTBCustomItem::Popup
(004E9BE9) Tb2item::TTBPopupMenu::PopupEx
(004E9BA6) Tb2item::TTBPopupMenu::Popup
(00409495) Vcl::Controls::TWinControl::WndProc
(0044C76F) Vcl::Comctrls::TCustomListView::WndProc
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll.GetSystemMetricsForDpi
(00034D96) USER32.dll.CallWindowProcW
(00079E97) COMCTL32.DLL
(00079F36) COMCTL32.DLL
(00079CEC) COMCTL32.DLL
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll.GetSystemMetricsForDpi
(00034D96) USER32.dll.CallWindowProcW
(004C32DF) Dragdrop::TDragDrop::WndMethod
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000369B5) USER32.dll
(0003AEBD) USER32.dll
(000740DB) ntdll.dll.KiUserCallbackDispatcher
(000350B8) USER32.dll.SendMessageW
(0019F621) COMCTL32.DLL
(000A4C84) COMCTL32.DLL
(000648A2) COMCTL32.DLL
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll.GetSystemMetricsForDpi
(00034D96) USER32.dll.CallWindowProcW
(004095A6) Vcl::Controls::TWinControl::DefaultHandler
(0048CEF8) Customdirview::TCustomDirView::WMRButtonDown
(00409495) Vcl::Controls::TWinControl::WndProc
(0044C76F) Vcl::Comctrls::TCustomListView::WndProc
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll.GetSystemMetricsForDpi
(00034D96) USER32.dll.CallWindowProcW
(00079E97) COMCTL32.DLL
(00079F36) COMCTL32.DLL
(00079CEC) COMCTL32.DLL
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll.GetSystemMetricsForDpi
(00034D96) USER32.dll.CallWindowProcW
(004C32DF) Dragdrop::TDragDrop::WndMethod
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

(000018C6)WINMM.DLL
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(00001F31) WINMM.DLL.PlaySoundW
(00015A6E) WINMM.DLL.PlaySoundA
(004E1BF2) Tb2item::TTBCustomItem::CreatePopup
(004E1CE9) Tb2item::TTBCustomItem::OpenPopup
(004E1DD5) Tb2item::TTBCustomItem::Popup
(004E9BE9) Tb2item::TTBPopupMenu::PopupEx
(004E9BA6) Tb2item::TTBPopupMenu::Popup
(00409495) Vcl::Controls::TWinControl::WndProc
(0044C76F) Vcl::Comctrls::TCustomListView::WndProc
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll.GetSystemMetricsForDpi
(00034D96) USER32.dll.CallWindowProcW
(00079E97) COMCTL32.DLL
(00079F36) COMCTL32.DLL
(00079CEC) COMCTL32.DLL
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll

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.