WebProtectionDefs definitions folder question (not a lot of files in it)

I'm wondering what I should be seeing in the WebProtectionDefs folder as it doesn't seem like there's any actual definitions there.  This is what I see on my machine.  There are three files: definfo.dat, NcoDefs.ncz and usage.dat and two folders: 20081231.004 and BinHub.

 

The thing that doesn't seem correct is that there are only 4 files in each of the two folders:

Catalog.dat, v.grd, v.sig and virscan1.dat

 

The NcoDefs.ncz file is a zip file with a lot more files in it than the four above, but none of them have been extracted. 

 

Is what I'm seeing normal?