Issue: You want start over again with an EPM System configuration but do not want to uninstall EPM System and repeat the installation.
Solution: Before restarting EPM System Configurator to begin the configuration again, follow these steps to undo the first configuration but keep the installation image:
Remove oracle.instances from $HOME (UNIX) or Documents and Settings/userid (Windows).
Remove all instance locations, such as MIDDLEWARE_HOME/user_projects/epmsystem2.
Remove MIDDLEWARE_HOMEuser_projects/domains.
Ensure that you use new, empty databases.