When opening any opportunity documents located inside the folders on files tab, there is no way to get back to folder structure easily without clicking around and refreshing the page. 

Moving back to folder structure once opened a selected folder. Now when changing the view and change back again to get back that folder which is not a preferred solution for users.

Could you please try to develop a button to move back from folder structure to normal view.

Currently user selecting view or doing refresh to come out from the folder.