Click on Reinstall LibreOffice/Microsoft Word Add-in and then restart your word processor.In the Cite pane on Zotero preferences, open the Word Processors tab.This is one of the few instances where re-installation could be helpful. Re-installing Zotero rarely fixes problems and shouldn't be used as a general troubleshooting step.It isn't necessary to uninstall Zotero before re-installing simply install Zotero on top of the existing installation.If you don't see either the Zotero Word for Mac/Windows Integration or Zotero LibreOffice Integration in the Extensions window, then you should re-download and re-install Zotero.If the Enable button for the Zotero Word for Mac/Windows Integration is grayed out so that you're unable to click on it, click on the Remove button and then restart Zotero.If either the Zotero Word for Mac/Windows Integration or Zotero LibreOffice Integration is disabled, click on the Enable button to re-enable the extension.
In Zotero, go to Tools → Add-ons → Extensions.If the Zotero thread/toolbar (or the Zotero scripts menu in Word 2008/2011 for Mac) doesn't appear, follow these steps: