无法将ADT插件更新到版本23.0.0或以上版本?

I am beginner in Android programming. My problem is, that I can not update ADT. The problem started, when after a long time I have updated in Android SDK Manager the Android SDK Tools. Then I was trying to import a project into the workspace. But I couldn't import that, because every time I clicked the Finish button, nothing happened. Then I closed Eclipse and opened it again, and showed me the following error:I am beginner in Android programming. My proble