How to get back the static folder-expand "+" marks in tree (Win10)

I just upgraded to Win10 from Win7. In the directory tree pane, the "+" marks to indicate expandable folders are no more. The are replaced by usually invisible ">" marks.

I wish to have static "+" marks (preferabley) or static ">" marks -- that is, always on and just on during a mouse-over.

Is there a setting for this, either in DOpus or in Win10?

Try turning off Visual style:


Perfect. Thanks!