We'd like to ask anyone still using AdWords Editor 2.0, 2.5, or 3.0 to upgrade to the latest version (3.5) before July 10, 2007. After July 10, versions 2.0, 2.5, and 3.0 will no longer be supported. To upgrade, just follow the automatic download prompt that appears whenever you start AdWords Editor. You can find instructions on how to preserve any comments or unposted changes when you upgrade here.
Also, in order to optimize our resources and provide the best experience for you, we've implemented a new versioning policy. Each time we release a new version of AdWords Editor, the older version will be supported for 60 days to allow time for you to upgrade.
For a complete list of version-specific changes, please see our release notes. To see what version you're using, go to the Help menu > About AdWords Editor.