A new version of AdWords Editor with a few exciting updates is released. If you're already using AdWords Editor, you'll be prompted to upgrade automatically. This update won't require you to re-download your account, and it won't affect your comments and unposted changes. In the auto-update prompt, choose the 'Update without Backup' option; after you upgrade, your account will already be in the new version. If you're not already using AdWords Editor, you can download here.
More info: Release Notes (version 7.5.1)