Google quietly announced on Google+ that they issued a new version of the AdWords Editor, a week after releasing a huge update to it in AdWords Editor v 11.
This release is 11.0.1 and aims to fix a CTR (click through rate) reporting display error. Google said it also fixed other things but did not disclose those changes, nor are they documented (currently) in the release notes.
Google said:
We’ve introduced an update to AdWords Editor 11 to fix some minor issues, including how clickthrough rate (CTR) is displayed. To get the new experience, please download and install the latest version of AdWords Editor 11.
Forum discussion at Google+.