Install and Configure the Experience Service > Modify an Experience Service Installation
  
Modify an Experience Service Installation
You can use the installer to modify an installation of the Experience Service.
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Modifying an installation when running the installer in Unattended mode is currently not supported.
When running the installer, if you select a directory that contains the same version of the Experience Service that is going to be installed, the installer enters "Modify" mode. In Modify mode, the steps are the same as in a fresh install, except when asked to select an installation directory, select the directory that contains the installation that you want to modify.
When in Modify mode, the installer applies any changes specified to the existing installation.