Text formatting options in Movable Type

My version of Movable Type offers 6 different format types:

1. None


2. Convert Line Breaks


3. Markdown


4. Markdown with SmartyPants


5. Rich Text (I replaced the default with FCKEditor)


6. Textile 2

A few things to note:

• You can easily disable Markdown, Markdown with SmartyPants, and Textile 2 via System Overview--Plugins


• Once you've changed an entry to Rich Text (or started an entry as Rich Text), you can't really change it back to one of the other options.

Personally, I would like to remove all options other than Rich Text. I have not yet found a simple way to do that