Yep...same problem for me. I too am a fully paid user. Note lists appear fine, but the view window (for editing) just goes blank every few days on both my laptop and PC...but never my iPhone. The only solution I have found successful is to uninstall and reinstall the App. Very, very frustrating. There are no shortcuts (F11) that work on note lists in the latest version that I can find. F11 simply toggles full screen. About to bin this app after years of use and change to something more stable and usable.