It seems Evernote is reducing functionality to match Evernote on the Mac. Over the years I have gotten a bunch of Mac users to adopt Evernote, but it was always so clunky to explain to them how to do things like rename notebooks, because right clicking was not made available to them in the Mac version. Looks like Evernote has decided to make the Windows and Mac versions converge by a least common denominator approach.
This is unfortunate. The core concept of a graphical user interface is that you see something of interest, and you interact with it to explore, edit it or activate it. Right clicking was an obvious action for a hand on a mouse, double clicks good too.
Now, with the new Evernote, you see/find a notebook in the sidebar, and realize you should change its name. Stop -think what type of things this is - a note book. Traverse the GUI to find where Notebooks can be managed - the Notebooks root. Which, if you are a long down your sidebar, will be off screen. But navigate there. Then find the note book you wanted to work on (not helped by the bizarre defaulting inside Note Books) , then finally right click it. Clearly a more efficient interface than right clicking the Notebook in the sidebar.
Many thanks to DTLow for describing the new required SOP! - I was stumped. Had not thought of the sad Mac SOP.