Zotero missing from Word's 'Customize the ribbon'

I'm trying to create a keyboard shortcut for Zotero (insert citation) but Zotero doesn't appear in the Customize Ribbon tabs. It's correctly installed and works perfectly in Word, and I've managed to create this shortcut on a different computer (same Zotero account; same Microsoft Office account).
Why shouldn't it appear as a tab, when it is clearly installed and running normally?
I'm using Office 2016
Sign In or Register to comment.