GUIDE ON UPDATING OF ANDROID STUDIO'S

Update the IDE and SDK Tools
Once you install Android Studio, it's easy to keep the Android Studio IDE and Android SDK tools up to date with automatic updates and the Android SDK Manager.

Update your IDE and change channels
Android Studio notifies you with a small bubble dialog when an update is available for the IDE, but you can manually check for updates by clicking Help > Check for Update (on Mac, Android Studio > Check for Updates) or still download from the Website to avoid error in patching (due to unforeseen circumstances).

Updates for Android Studio are available from the following release channels:

Canary channel: These are bleeding-edge releases, updated roughly weekly, and available for download at developer.android.com/studio/preview.
In addition to receiving canary versions of Android Studio, you will also receive preview versions of other SDK tools, including the Android Emulator.

Although these builds are subject to more bugs, they do get tested and we want to offer them so you can try new features and provide feedback. This channel is not recommended for production development.

Dev channel: These are hand-picked canary builds that survived a full round of internal testing.

Beta channel: These are release candidates based on stable canary builds, released to get feedback before going into the stable channel.

Stable channel: The official stable release that is available for download at developer.android.com/studio.
If you'd like to try one of the preview channels (Canary, Dev, or Beta) while still using the Stable build for your production Android projects, you can install both side by side.

To think of the stable channel is recommended for developers and is not about the version. You might have a release version from canary channel to be 4.01 and from beta channel to be 3.6 but from stable channel in which it name imply, will have a 3.52 version meaning according to all definitions and as someone who wants to develop app for Google Play Store you stick with stable channel.


Update Channel
To change the update channel for an existing install, proceed as follows:

Open the Preferences window by clicking File > Settings (on Mac, Android Studio > Preferences).
In the left panel, click Appearance & Behavior > System Settings > Updates.
Be sure that Automatically check for updates is checked, then select a channel from the drop-down list (see figure 1).
Click Apply or OK.

The Android Studio Updates preferences.

Delete unused Android Studio directories

When you run a major version of Android Studio for the first time, it looks for directories containing caches, settings, indices, and logs for versions of Android Studio for which a corresponding installation can’t be found. The Delete Unused Android Studio Directories dialog then displays locations, sizes, and last-modified times of these unused directories and provides an option to delete them.

The directories Android Studio considers for deletion are listed below:

Linux: ~/.AndroidStudio[Preview]_version_
Mac: ~/Library/{Preferences, Caches, Logs, Application Support}/AndroidStudio[Preview]_version_
Windows: %USER%\.AndroidStudio[Preview]_version_