Download and extract the files, no install required. The ExpressionEditor.zip download contains a folder for each SQL Server version.
Fixed stack overflow in 2008/Denali build.Versions
There are three versions, all with the same functionality, but each targeting a different release of SQL Server. The download contains all three versions, so just use the one to match the version of SQL Server you have installed.
- SQL Server 2005 - v188.8.131.52
- SQL Server 2008 (Includes 2008 R2) - v184.108.40.206
- SQL Server "Denali" - v220.127.116.11