The simpliest way to change this for ALL WYSIWYG editors is to do the following...
- Go to Administration > Settings
- Click the Advanced link to view the Advanced Settings
- Click the section labeled Appearance on the left
- Third setting from the bottom you will see the option labeled "Rad Editor new line 'br' tags". Just uncheck this box and click Save changes.
That's it and all of your RadEditors are now using paragraph tags instead of break tags when pressing [ENTER]. Enjoy.