For the Publication Typefaces Collection that is part of the Creative Collection, the fonts are provided as .affont files. But I can't seem to find how one should install those. The OS doesn't recognise it as regular fonts and there doesn't seem to be a button to install fonts from within the Affinity suite. Also, the bundle is not showing up in the addons (downloads) section of the user account. From the install guide: tl;dr How am I supposed to install these?