Before you go on, make sure you have configured the plugin properly. Check out this article for more information.
To confirm that topic tracking for users is working (new topics, unread topics, and new replies), you need two user accounts: one to create a new topic, and the second account to visit the forum with the new topic to get to see the mark for ‘new‘.
If it is not working, check if the database tables are created during the update. Table name is ‘wp_gdbbx_tracker‘. You can run Tools -> Recheck and Update to make sure all is OK.