An old thread, but it was not answered and I'd really appreciate some help. I'm going through all the steps in the manual/various sources online, ticking the "show in toolbar" box, but the button is not appearing. I've tried both Project Settings and through the Tools>Options>File Types route (both varieties of Word). Nothing!
Thanks for any help....
after going through the process of creating a Quick Insert item, just close Studio and open it again. your new Quick Insert item should show up.
it worked for me this way in Studio 2014.