Hey guys I reinstalled the android SDK because of Googles latest package( It was a all in one android development solution), and now eclipse gives this prompt saying: "This ADT requires Android SDK Tools revision 21.0.0 rc9 or above. Current version is 20.0.0. Please update your SDK Tools to the latest version". and so I opened the SDK manager, then I selected the Tools checkbox, and for some reason I couldn't update the tools, I could only delete them. So my question is: How do I update android Tools in the SDK Manager?