[racket] Generating PDF from Scribble on Windows

I'm working with our online/distance-learning people to set up a course, 
and creating my slides in Scribble using the "Scribble PDF" button. A 
change in personnel is coming up, and the new developer is using 
Windows. My current developer is using OS X like I am, and he reports 
with some alarm that DrRacket in Windows is missing the "Scribble PDF" 
button when editing a Scribble file. The buttons that are visible (I 
have a screenshot if anyone needs it) are Debug, Check Syntax, Macro 
Stepper, Scribble HTML, Run, Stop. The Windows machine has LaTeX 
installed. Can anyone diagnose this issue? Thanks. --PR