The 11.1 release of ArcGIS Pipeline Referencing includes minor enhancements to the software and the documentation; no major new functionality is included with this release.
The stand-alone Location Referencing installer is no longer required in 10.9 or later releases. However, the software must be authorized using a Location Referencing license key on each machine.
Learn more about enabling Pipeline Referencing in ArcGIS Server 11.1
You can download the ArcGIS Event Editor from My Esri.
For a complete list of enhancements and issues addressed, visit the product download page.