"Add New Workflow" button missing from Substance for Maya Plugin

Hello,

I'm setting up Redshift materials in Maya using SBSAR files, and in the documentation it shows an "Add New Workflow" button for automatically connecting outputs to a shader type.  In the example, it shows it working for an Arnold shader.  Problem is, I don't have this button in Maya 2019 with the Substance plugin.

The documentation for this feature is here:

https://substance3d.adobe.com/documentation/integrations/using-workflows-180191819.html

There is even a documentation page for choosing Redshift as a default Workflow, but this is also missing for me:

https://substance3d.adobe.com/documentation/integrations/redshift-for-maya-166363165.html

I've attached a picture of my sbsar node settings in the Maya hypershade.

Is this feature just not in the substance plugin for Maya 2019? Or is this feature missing for some reason?