Theme: Clean Cannot select drop down menu items

I can definitely see what you mean by not being able to select sub items (the subnav disappears as soon as you mouse off of the parent menu item).

The second link you provided is for a plugin that hasn’t been updated for quite some time and likely isn’t maintained anymore. Are you using that plugin with your theme? If so, what type of features are you trying to use the plugin for? You might be able to find a newer plugin that provides the features you’re looking for.

Hmm…I don’t know why I included that second link. I just confirmed by looking at all of the installed plugins on our site that we are not using it. The menu functionality is included in the Clean theme.