@thiagorcesario: 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

Error message:
List index out of bounds (0)

Rastreamento de pilha:
(001FBBBD) System::Classes::TStringList::GetObject
(001FBBBD) System::Classes::TStringList::GetObject
(00D24627) UnixExtractCommonPath
(00D1C271) Queue::C3612_0
(00D20FB8) TDeleteQueueItem::TDeleteQueueItem
(00018849) TCustomScpExplorerForm::DeleteFiles
(00011F60) TCustomScpExplorerForm::ExecuteDeleteFileOperation
(00012016) TCustomScpExplorerForm::ExecuteFileOperation
(0001221C) TCustomScpExplorerForm::ExecuteFileOperation
(000123DB) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0004D5DA) TNonVisualDataModule::ExplorerActionsExecute
(00262B34) System::Actions::TContainedActionList::ExecuteAction
(00346749) Vcl::Actnlist::TCustomAction::Execute
(00214D34) System::Classes::_18201
(000313A1) USER32.dll
(000220B1) USER32.dll
(00020970) USER32.dll
(000204BB) USER32.dll.DispatchMessageW

(01005275) C6085_3
(0100684F) _ReThrowException
(00018A9D) TCustomScpExplorerForm::DeleteFiles
(00011F60) TCustomScpExplorerForm::ExecuteDeleteFileOperation
(00012016) TCustomScpExplorerForm::ExecuteFileOperation
(0001221C) TCustomScpExplorerForm::ExecuteFileOperation
(000123DB) TCustomScpExplorerForm::ExecuteFileOperationCommand
(0004D5DA) TNonVisualDataModule::ExplorerActionsExecute
(00262B34) System::Actions::TContainedActionList::ExecuteAction
(00346749) Vcl::Actnlist::TCustomAction::Execute
(00214D34) System::Classes::_18201
(000313A1) USER32.dll
(000220B1) USER32.dll
(00020970) USER32.dll
(000204BB) 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.