The program document does not say the operating system requirements.
Mr. Windows Freeware installed it on Windows XP, it works fine.
Requirements for version 8 : Windows 98 / ME / XP / 2000 / NT4
Description : "The BEST download manger program on Windows platform" Mr. Windows Freeware - 10/26/2008
What it can do : Boost the downloading speed by splitting files, resume downloading, queue downloading and shut down both the program and a computer when downloading completes.