Thank you, but I'm afraid it didn't help. I installed it properly as instructed.
Within Word the Measurement Converter is shown as being in ......Common Files/Microsoft Shared/Smart Tags/. No such subfolder appears on my computer. Perhaps this is one of those items Microsoft has quietly removed without any notification?!
I do have other ways of converting of course, but as an Additional Action it was useful.
Thank you again for taking the time to comment and advise.
Best wishes