Android Studio 0.1.5 just Released. This release contains only bug fixes and infrastructure work, as well as a merge with the latest IntelliJ 13 development branch.
~ source: https://sites.google.com/a/android.com/tools/recent/studio015released
Install/Update Android Studio:
If you are already running Android Studio, just restart it, or manually check for updates via Help > Check for Update... (on OSX, look in the Android Studio menu).
If you do not already have Android Studio, install the latest full install from