...
You have downloaded the installer for Windows or Linux systems. See Downloading the Datical DB Installer
Prior to upgrading, you can choose to keep your older version installed or uninstall it.
If you choose to uninstall, run the
uninstall.jarfrom <INSTALL_DIR>/Uninstaller directory.
...
follow these instructions: Uninstalling Datical DB Components .
If you choose to keep your older version installed, follow this best practice:
...