How can I change the default editor away from Kupu?
First, every user can choose whether Kupu should be turned on or off. You can do this by clicking on your login name (at the top right side of the browser page) and choosing Personal Preferences. From there, you can choose your Content Editor (and turn off Kupu or use another rich text editor). Another option is to install the FCKEditor implementation for Plone. For more information, see http://plone.org/products/fckeditor. Although you can install FCKEditor just like you would any other Plone product, you can also use easy install to install FCKEditor.