Upgrading smarttarget_conf.xml if you are upgrading from SmartTarget 2014 SP1
The smarttarget_conf.xml file has changed between SmartTarget 2014 SP1 and Experience Optimization 8.5. Use a migration tool to migrate the file.
Moving configuration files from the SmartTarget Web service to the Experience Optimization Management service
Migrating your SmartTarget in-process Web site extension to an Experience Optimization RESTful Web site extension
Upgrading SmartTarget on a .NET Web site running an in-process API Server Role
Upgrading SmartTarget on a Java/JSP Web site running an in-process API Server Role
Replacing the SmartTarget 2014 SP1 Web service with the Experience Optimization Management service
Upgrading or migrating Experience Optimization on your Presentation Server