I get this error \"Error! Could not find a Joomla! XML setup file in the package.\"
When you get this error, it is likely that you have installed the wrong version of the plugin. We have two versions of the plugin available, one is for Joomla 1.5 and the other plugin is for Joomla 1.6, 2.5 and up. Please make sure you download the one appropriate for your Joomla installation.
You can find more information about the plugins and setup on your profile page.