You can upgrade to version 9.7.1 through the auto-update prompt or download the latest version from the AdWords Editor website. After you install the new version, you’ll need to download your account again. To preserve your comments and unposted changes, select the ‘Backup then Upgrade’ option in the automatic upgrade prompt, then import the backup file after downloading the account.
For a complete list of version-specific changes, please see our release notes. To see which version you're using, go to the Help menu > About AdWords Editor.