unsolicited backup to the cloud

I recently cleaned my harddrive and noticed that I gained 10GB of free space. I had previously downloaded a You Tube

downloader    http://download.cnet.com/Free-Youtube-Downloader/3000-2071_4-75450165.html?tag=dre  , that has a

backup program ( Select-N-Go_Up ) in it. Can this program run on its own and empty my harddrive to whomever in

the cloud??? Is this the new method of stealing peoples info off of their computers?  I have since uninstalled it, and hope

there is nothing else to damage the computer. Other than not downloading, is there any way to prevent the harddrive

from being backedup??  Thanx in advance