Ubisoft download manager sucks balls

I got a free copy of Assassin's Creed 3 when I bought a video card. I had to download it using something called Ubisoft Download manager. Man that things sucks. Maybe I'll post more once I figure out how to get it to work. It keeps reporting CRC failures and requests that I turn off DMZ on my router (which isn't turned on btw). What an embarrassing piece of crap software.