This Android SDK requires ADT version 23.0.0 or above. Current version is 22.6. Please update ADT to the latest version? [duplicate]

You can also update the ADT plugin

1. Select Help > Install New Software
   
2. Work with: p2repo - https://dl-ssl.google.com/android/eclipse/
   
3. Select Developer Tools and Next
4. Next, Accept the license agreement* and Finish

You can re-install them as follows:

Goto: Help--> About Eclipse SDK--> Installation Details. select the plugins you want to uninstall

install them as: Goto: Help--> Install new software

add https://dl-ssl.google.com/android/eclipse/

select the plugins to install.

You have to update Your ADT Plugin. I everytime do it as administrator:

1. Select Help > Check for Updates.

2. In the resulting Available Updates dialog, locate the Android DDMS and Android Development Tools features in the list and ensure that the checkboxes next to them are selected. Click Next.

3. In the Update Details dialog, click Next.

4. Read and accept the license agreement and then click Finish. This will download and install the latest version of Android DDMS and
   Android Development Tools.

5. Restart Eclipse.

If it is not clear enough and some pictures will help You, see here:

http://theopentutorials.com/tutorials/android/updating-android-sdk-and-eclipse-adt-plugin/