Ever since I upgraded my Mac Mini to Mountain Lion (Mac OS 10.8.1) when I start Evernote it asks for my user name and password, then that screen goes away and then I can do nothing else. It doesn't load the window to show my notes, I can't make new notes or anything. If I click off the application then go to the dock to go back to it, it takes me back to the sign-in screen. I have twice tried deleting the application and re-installing it from the Apple App Store. That didn't fix anything. However after each re-install it still remembered my user name, so there must be a preference file or something that I can't find. Anyone have any ideas on how to fix this?