This is what httrack.exe says..

E:\I>"C:\Program Files\Communicatie\Internet\Download\WinHTTrack\httrack.exe"
ocw.whtt
There is an index.html in the directory  but no cache
There is an index.html in the directory, but no cache
A site may have been mirrored here, and erased..
Be sure parameters are ok

Press <Y><Enter> to confirm, <N><Enter> to abort
n

(I didn't dare to say Y, for fear of losing 75GB of material.)