I had the same problem with version 3. the view option in the dashboard was taking me to an individual-strange looking page and the drop downs were having the save behavior, I have reverted the version and works now.
I really like this plugin, I hope it gets fixed!
I found the issue was with another plugin Exclude pages if i exclude the page using the plugin above, the listing of pages doesn’t work. I had to learn how to pause its functionality using
<?php pause_exclude_pages(); ?>
<?php resume_exclude_pages(); ?>
now is listing the subpages! 🙂
so I’m guessing the external service was offline causing the the plugin to crash. I’ve renabled the plugin and things are back to working.