I have exactly the same problem. It is frustrating that I can not see my notebooks even on the left side bar. The main function of Evernote is to be organized and more productive workflow. But without notebook display how we can be productive or organized? I am a premium user and paying for Evernote but Evernote is getting worse than before in everyday. Previous windows app, 6.25 version is quite impressive and working very good. Why they made it worse than before, still can not understand. We are not beta users, it is a public release and notebooks are the main function of Evernote. OMG, it is unbelievable. It is same in IOS version as well.