Also in v10, multiple notebook windows / tabbed windows is gone, all my formatting is gone, it's using 100% CPU for hours, BUT they managed to implement Find & Change inside a note. Wow! That took some years. Now with 'multiple windows' gone and the 100% CPU and the same slowness as before, it is now become unusable for me. I've had it with Evernote. I'm going to move 10000 notes to something else. UNLESS ... they bring back the multiple notebook window feature back within a week. .... nah, a week is too long. I've already decided.