Have you tried contacting the author of Visual Composer? Or if you have a theme bundled with Visual Composer you will need to contact the author of that theme.
Yeah … They make you pay for support. It’s included for a time but then falls off. And of course a few months after my support falls off I get an issue. I got this same answer on Wordpress Forums too. If there is a community support resource that you know of please let me know.
I didn’t find a fix. But someone said to move the Visual Composer editing window and the pull down menu is underneath it. And that worked. So you click on the pull-down menu, then physically slide the editing window to the side. And there’s the pull-down choices. Not easy, but it works.
even lazier way is to use something like http://coffee2code.com/wp-plugins/add-admin-css/ and add it there - i think this is fixed in newest version of VC