A. Unless someone was in your house and managed to get on your computer, nobody hacked your add-ons.
B. You posted this in the wrong place
C. To get your
default add-ons back, you should reinstall.
D.
When i downloaded it and extracted it, I lost everything...
You don't extract it.
Getting your old add-ons back might be hard or even impossible depending on what happened. Also, it would greatly help if you gave us more information. Until then, the only suggestion I can give you is to re-install the game and then get your add-ons back by finding them again and downloading them. Again,
don't extract anything. The .zip file goes directly into the add-ons folder.