MDS Addin disabled and will not repair

I have a problem with the MDS Excel Addin being permanently disabled on Win 10.  After repair then reinstall I followed these steps to fix:

https://support.netdocuments.com/hc/en-us/articles/205219670-Changing-the-Load-Behavior-of-the-ndOffice-Add-ins?mobile_site=true

Here’s the initial state.  If I check the COM addin to enable, and go back in it is immediately disabled.

<v:shapetype coordsize="21600,21600" filled="f" id="_x0000_t75" o:preferrelative="t" o:spt="75" path="m@4@5l@4@11@9@11@9@5xe" stroked="f"><v:stroke joinstyle="miter"><v:formulas></v:formulas></v:stroke></v:shapetype>Unfortunately it was already set to auto load

So I went to their plan B.  This key was not in the registry at all so I manually entered it:

But no luck, it is still showing disabled.   Any ideas what to try next?

  - Pete