Today, I reversed this as I needed a download manager and I found IDM to be the best. At the time of posting this, no other website has this crack as Build 10 was released on 30th April 2013.
Many friends(including Factionwars and m0rph) suggested me to post a tut on how I cracked this program but that would be too long. So I am just posting the exe.
How to use it?
Just download it, disconnect the net connection, copy and paste this file in the folder where IDM is installed (usually C:\Program Files\Internet Download Manager), click on copy and replace, then go to registration and fill in the details. In the serial key, fill 11111-22222-33333-44444 and then OK. Now exit the program and connect the net and enjoy the program.
You can update it easily without fear.
Enjoy!!