Users without the permission to view thread content can still see the posts in the widget (the same way they can see them in forum view).
Added a new widget option for post excerpt that allows you to show it for the users who have the permission to view the thread but not the content.
Bug Fixes
Not filtering results based on node permission and ignored users.
Removed template vars that are not used.
NOTE: Disable add-on before starting the upgrade process and once complete, edit the widget and just save it to update the widget settings cache.