The current options are "Start on Home" and "Resume where I left off".
Feature Request:
Allow user to select "Default Notebook" and any one of the existing locations as possible options.
I have mine set for "Resume where I left off", except it just always opens "Notebooks" instead of the specific notebook I was last in. If I happened to be in a notebook called "Receipts" when I closed the application, I would expect that this setting would open that same notebook when I next opened Evernote.