It depends on how fast your internet is. Previous poster said 2 in a half hours yet it took me a little over an hour and when I first started almost 6 years ago it took almost 24 hours.
If i Download Allods via My.COM launcher it takes half an hour
you can try to stop the downlaod for a few minutes, close every sytem what needs internet and start the download again, maybe you get some more downloadspeed