How do I machine a single line font?

The Single Line Fonts included with the program are designed for drag type engraving tools using the Quick Engraving Toolpath.  

However, you can machine them with ordinary router bits (typically v-bits or engraving bits) using the Profile Toolpath with the On option selected and a shallow Cut Depth set.

The Toolpath Preview will allow you to try different combination of bits and Cut Depths until you get the look you need.