FrameMaker 11 in Win 10 Environment-Avenir 95 Black and Black Oblique fonts not rendering correctly

I am working in Structured FrameMaker 11, version 11.0/0/380 in a Windows environment.

I'm encountering issues with the bol and bold+italics versions of the Avenir LT Std 65 Medium font not rendering when I attempt to apply them to text by using the paragraph designer. In the FM font menu, the Avenir fonts list like this:
Avenir LT Std 35 Light

Avenir LT Std 45 Book

Avenir LT Std 55 Roman

Avenir LT Std 65 Medium

As I understand it, the Avenir 95 Black font is the equivalent of the Avenir Medium when bolded. The Avenir 95 Black Italics is the equivalent of Avenir Medium when bolded and italicized.

In the paragraph designer, when I select the Avenir 65 Medium font, the only available choice that I have under 'Weight' is 'Bold'. When I select 'Bold' and click the Apply button, the bold weight (Avenir 95 Black font) is not being applied. I can't apply the bold-italicized version either (Avenir 95 Black Italics).

It was suggested that I check the Weightings list in the maker.ini file and add the following entries, if they are not currently there:
Black 400
ExtraBlack 800

I checked the maker.ini file and there currently are no entries for 'Black'. I am going to add them and see if this resolves the issue.

In the event that this does not resolve the issue, are there any other possible solutions that I can try in order to resolve this font problem?