you can improve the documentation by editing the wiki page here: https://doc.tiki.org/PluginGroup
Thanks for that. As I also had problems with Tiki going to the wrong URL on logging out, I took your suggestion to switch to the GROUPS plug-in, which fixed it.
One thing I noticed with the plugin is that the ELSE parameter must be in upper case. How do I get that documented and/or feed it in to the developers?