Safari bookmark folder disappeared
OS: Yosemite 10.10.5
Safari V9.1.1
I had a folder in my bookmarks called Popular. It was visible on the bookmarks bar at the top of the window.
It contained all my working bookmarks.
I just noticed it has disappeared and does not show up when I open 'Edit Bookmarks'
Obviously I want to find it again.
I read some older threads about bookmarks disappearing but although I can find the bookmarks.plist file it looks like my missing folder is not in there.
Any help to find if it is still somewhere much appreciated. I not think I have a Time Machine backup unless there is some auto backup??
MacBook Pro, OS X Yosemite (10.10.3)