First of all, thanks for a great series of mods. No idea what I would do without these :-)
And then to my problem. Everytime I try to install a custom font i get errors, and wow has even crashed on one occation. I have placed the fonts (I use clearfont, so it would have been nice to get it for the DAB/DUF part as well) in the CustomFonts folder of each mod, and tried every possible path i could think of, but to no avail.
For both you should be to type in just the full filename of font, including the extension. Make sure you're capitalizing it correctly. DAB but not DUF can also take a full path which would be Interface\AddOns\DiscordActionBars\CustomFonts for its CustomFonts folder.