In this release, the locations for user configuration directories have been changed, consistent with recent updates to IntelliJ IDEA, the IDE on which Android Studio is based.
For more information, please see the release notes.
In Canary 9, you may see the following error when first launching Android Studio after upgrading:
missing essential plugin org.jetbrains.android
This can happen when you import your settings from a previous version of Android Studio. Typically, this means you have a locally installed Kotlin plugin that is not compatible with the new IDE.
For a workaround, please see the release notes.