Please try updating to the latest version before using the instructions below; the method of font usage has changed in versions after 4.5.0 (including V5)
Note that on Windows, fonts are sometimes prevented from loading, see this article for details and remedies.
In versions earlier than 4.5 this problem generally occurs when fonts haven’t installed correctly during installation. Download the following file, unzip it and install the fonts using the instructions below.
Open the Control Panel and then Fonts. Drag the unzipped fonts files into the opened Fonts folder.
Double click on each of the unzipped font files and then click on ‘Install Font’ at the bottom of the font preview window.