What version are you using. I cannot get to be read only. It is always read/write. One thing that is different is that I cannot open it in the AC screen. That is if you mean by that the screen on the right. The HTMLs do and some other files do but not these.
When I click on the file or anywhere in the white field for that matter, it brings up a box which allows me to either open it or save it. I don't even have to right click and say open in default application. It just always does. And, I can always add something.
