Although I do like this add-on, unfortunately it 'has' started to interfere with Wordpress admin.
I explain.
When you are editing a page and chose Text (i.e. source side) it locks it and I cannot do anything, as if there was a layer protecting it from editing!
I now am forced to switch it off and if I forget - i.e. edit a page after a few weeks, I tend to go stupid for the next 30 minutes until I remember it is your add-on. Please fix it as I like it! Hence 4 starrs or would be 1 star.