Missing Metconv?

[BillDon]

Metconv suddenly no longer works. In Options it states that it is activated, and the words additional actions appear when a measurement is selected and right-clicked but nothing happens. i.e., when I right click 72 inches for example, nothing happens. It used to give me that measurement instantly in centimetres.
I have tried an online repair of Office 365 etc., but all to no avail. The file appears nowhere.


Any help would be much appreciated.