Extension Manager 6.0.7 Update
Installation failed. Error Code: U44M1P7
I got this message and was told to contact Customer Support. Was using the Updater. There is like no way to email Customer Service so I thought I'd put it out here and see if anyone responds.
Please delete Extension Manager CS6 installation folder directly, then download and install 6.0.7 from http://www.adobe.com/exchange/em_download/em6_download.html.