I've found that this program tends to lower the pitch of your resulting .wav files and makes them kinda icky.
Fortunately, the Ultrasabers Launcher can do this much better! Go into the Diamond effects wizard, create a new effect, then click "Add Sound". Select every .lsu sound file from your font (you can do all of them at the same time; the effects wizard will only show 15, but it does load all of them) and hit OK. This will create undistorted .wav files of all your .lsu's in the same directory!
You don't have to save this effect, btw; you're just opening it for the process of conversion.