4.1.3 Notes on overwrite installation and upgrade installation
In a Windows OS, when you perform an overwrite or upgrade installation of JP1/DH - Server, JP1/DH - Server resets the password for the database service user to p@ssw0rd.
For this reason, if you have changed the password for the postgres user registered in the OS (database service user) or you have changed the password for the database by using the dbchangepassword.bat command, specify the passwords again after the installation as needed.