1. Uninstall the Coordinator(s) that are part of the Installation name.
2. Wait for Replication to update all applicable GC's to ensure all Service Connections Points (SCP) have been removed.
3. Create a backup of the Change Auditor Database, to provide a roll back option.
4. Using SQL Server Management Studio modify the Change Auditor database table 'dbo.SystemProperty' table by changing the 'InstallationName' propkey value with the new Installation name.
5. Re-install the Coordinator(s) using the new Installation name.