Hello,
I just wanted to report that the Reusable Elements does not appear on the left sidebar like before. That seems to be a bug which probably appeared after the
“8/28/17 Added a way to look for new elements by typing in the editor” update.
But I found a tip to (temporarily) fix it (for anyone who’s experiencing the same thing): just tape any name of a reusable element in the new typing field, under “Elements Tree” (located at the top left)
Hope it might help