I tried to go to that location in the windows file folder - but there aren't any actual font files. If there were I could copy and paste into the windows font folder and it would work.
I just contacted Adobe teh support via chat and they are looking into this. But Designer is not really working with Adobe Fonts yet. Like Photoshop does. And that's unfortunate. Because I think you need to go through Designer if you want to get a font into painter. Amd Adobe won't let you download their fonts to the windows font folder. So the only way that I could see would be if designer could sync with Adobe fonts like Photoshop.
Thank you. I'll keep you posted on what I hear from Adobe. There is a ticket open on this issue now.
The font files are in the location I gave, within the r folder, but they are packaged differently to the fonts in the Windows Fonts folder. You can see an XML manifest in the c folder, under the same path.