Android Studio: "Update & Restart" doesn't work
I've solved the problem. It is important how Android Studio was started. If I start it with a workspace parameter:
/android-studio/bin/studio.sh /<path_to_workspace>
then the update doesn't work.
So the solution is to start the Android Studio without any parameters.
I successfully updated my AS from 2.1.1 to 2.2.2, by the following way:
File > Close Project. Close AS.
restart AS, it will not open any project and show you a project list, but please don't open any project.
wait for AS to popup a dialog to remind you there is a new version.
click "update & restart".
after restart, it may remind you import previous configuration files.
import configuration, open a project, you will see the new version number.
hope this will help.
I actually created the issue and it seems they fixed it in the latest release and you have to download it manually from here and update mechanism should be fine.