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 Androi
I couldn't uninstall the old ADT plugins from the 'Help->Installation Details` page because the 'Uninstall...' button was disabled when I selected any of the modules.
Also, because the ADT bundle is no longer available to download, reinstalling was not an option.
What worked for me was to install the basic Eclipse environment using the Eclipse Installer from here. In the installer, I selected 'Advanced Mode...' from the hamburger menu, and then selected just the 'Eclipse Platform' to install, i.e. just the core tools. I think that this is only possible using the installer.
After eclipse was installed, I installed all the ADT plugins using 'Help->Install New Software' and using link https://dl-ssl.google.com/android/eclipse/.
YMMV, but this worked for me.