Problem openning two sessions at the same time (windows64 Ardour6))

When I try to open two sessions at the same time (I have one already openned, and open another one from Ardour´s files folder), Ardour asks me if I want to save and close the previous session. When I choose this option, Ardour remains in this action all the time not finishing closing the previous session. And it is not possible to close Ardour either…