Hi, before iOS11 Beta, I used to open WorkingCopy repos with the "Open ..." Menu.
On iOS11 the Open menu now opens the new Apple App "Files". In Files you can pick WorkingCopy again, but the PopUp with the WorkingCopy repos does not contain a Pick button, so I can not open the repo in Textastic. Same procedure works in GoCoEdit.
Customer support service by UserEcho