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:

1. File > Close Project. Close AS.

2. restart AS, it will not open any project and show you a project list, but please don't open any project.

3. wait for AS to popup a dialog to remind you there is a new version.

4. click "update & restart".

5. after restart, it may remind you import previous configuration files.

6. 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.