Set the default editor in Plone for all existing members.
When you install a new visual editor in your Plone 3 Site, you can set wysiwyg_editor in portal_memberdata to the proper value for this new editor. This only means that new users will get this new editor. To change the editor for all existing users, use this package.
In Plone 4 this should be less necessary, because this Plone version introduces an option for members to simply use whatever the current default editor of the site is. If you migrate from Plone 3 you can still use this package to change all members so they use this option.
This package makes available a browser view @@set-default-editor to change the editor setting of members. Follow the instructions there. This has slightly different functionality for Plone 3 and Plone 4. You can choose to run this in dry-run mode and see how many users would be changed. When dry run is not selected, details are logged to the instance log.
On the same form you can also select to set the default editor for new users (Plone 3) or set the editor that is used when ‘Use site default’ is selected (Plone 4).
I (Maurits van Rees) found the main code in an article by Rob Gietema. He apparently got the script from Kelly Craig. And I have seen the same code in a post to the plone-setup list by Reinout van Rees. So I claim it back in defense of our family honour. ;-)