Just looked here. Nope.
I even thought "oh!" - materialS.txt, and it came material(no S).txt -- that wasn't it either.

I have:
Volume in drive C is CNC_drive
Volume Serial Number is D85E-B4E2
Directory of C:\Mach3\Addons\Newfangled
09/15/2012 09:53 PM <DIR> .
09/15/2012 09:53 PM <DIR> ..
09/15/2012 04:03 PM <DIR> Bitmaps
05/23/2011 12:26 PM 2,457 ChangeLog.txt
09/15/2012 09:53 PM 0 dir.txt
05/23/2011 12:19 PM 777 init.m1s
02/09/2007 03:50 PM 283 Material.txt
02/09/2007 04:16 PM 1,069 MaterialHelp.htm
02/09/2007 03:50 PM 283 Materials.txt
05/23/2011 12:44 PM 329,682 newfangled.set
05/23/2011 12:48 PM 2,602 newfangled.set.def
10/20/2007 03:33 PM 2,902 ToolHelp.htm
9 File(s) 340,055 bytes
3 Dir(s) 62,043,160,576 bytes free
So they're all there that I can see. As I said, I had DL'd a fresh copy just in case, but no dice.