dotfiles/symlinks/config/Google/AndroidStudioPreview4.2/options/androidStudioFirstRun.xml

<application>
  <component name="AndroidFirstRunPersistentData">
    <version>1</version>
  </component>
  <component name="whatsNew">
    <shownVersion>4.2.0rc21</shownVersion>
  </component>
</application>