Hi,
I think so, there is a small mistake in website:
In Section "Minimum System Requirements"
Operating System: Microsoft Windows XP/2003/Vista (WebCopier Pro v5.0 and higher)
Microsoft Windows 95/98/ME/NT4.0/2000/XP/2003/Vista (WebCopier Pro v4.6 and lower)
They must be "WebCopier for Windows".
Regards