Clicking and holding on any page in the Binder transfers you to that page.
This makes it impossible to drag a page from the Binder to the Reference section of another page, as the tutorial says you can do. This section of the tutorial (5d) is not in Orange.
If you try to drag the page to the Reference box anyway, the Reference will dump into the the page you were trying to reference in the first place, because clicking on a new page in the binder navigates you directly to that new page.
note: using the Plus and Minus buttons to manage internal references works fine.