title: I use Inteliji , and i deleted a version of external library by mistake , how do i get it back?
body: <p>I use Inteliji IDEA for a scala project and this has some external library ,say x
  it has x-2.00 and x-2.02 , i deleted x-2.02  mistakenly , now how do i get this back ?
  OS : MAC</p>