I donated to try out your plugin as it seemed it was just what I needed.
After install and uploading a font it was available to select in the editor and available to assign to element. In the editor the new font showed up and was displayed perfectly. However when publishing the page/post the font defaulted to a Times New Roman font. Assigning the font to element does not work either.
Mmmm, it seems that after an edit of the UAF settings the new uaf.css is rewritten but not loaded by the browser. The stylesheet is referenced as ….uaf.css?v=4.0.1 and this does not change after an edit. Shouldn’t the version of the stylesheet be updated to force the browser to load the new css file in stead of the cached one?