When I hit update or save on OpenMenu related items, it serves me this error:
Warning: Cannot modify header information - headers already sent by (output started at /home/cawd/public_html/goblin/wp-content/plugins/open-menu/openmenu.php:1) in /home/cawd/public_html/goblin/wp-includes/pluggable.php on line 934
It seems to still be working, but throwing this error gives it the appearance that it isn't.
The plugin also needs more descriptions on how to use the app. It makes it seem as though you have to do more work than is needed. It's confusing.