How do I fully uninstall the Word Plugin?

Go to Tools > Templates and Add-ins.

Uncheck the Mendeley-x.x.x.dot (where x.x.x is the version number).

Delete the file in the file path as highlighted in the image above.

Go to File > Options > Add-ins.

Set the 'Manage' field to 'Word Add-ins' and click 'Go'.

Uncheck the Mendeley-x.x.x.dotm (where x.x.x is the version number).

Delete the file in the file path as highlighted in the image above, and click 'OK'.