How to change the WYSIWYG editor

Hi

I hope I am in the right place to ask this, but I am using WPMU Directory with a plugin called WP User Frontend.

This combination allows me to enable users of the website, to update their listings from the main website (thus not needing to visit the WP admin area).

On my public edit page /listings/edit-listings there is a Rich Editor text box where the user can write their content.

At the moment it has the FULL rich text formatting (including the Visual and Text tabs).

Is it possible to disable the FULL editor, and just have SIMPLE formatting available?

Thanks