How to upgrade Foundry on prem on Linux from version 9.5.15.7 to the latest version 9.5.18.1?

I'm trying to update an existing on prem installation of Volt MX Foundry version 9.5.15.7 running on Ubuntu 22.04 LTS to the latest version 9.5.18.1.

Deployment type: Development, non-containerized, single-server using "built-in" Tomcat

When i run the installer (VoltFoundryInstaller-9.5.18.1_GA.bin), it asks me to provide the destination folder.

If i specify the folder of the already existing deployment (version 9.5.15.7) here, the installer tells me, that this is not possible and that i need to provide a destination folder, that must be empty.

Later during the installation i provided the database details and selected to use the existing databases.

My expectation was, that this would bring over the existing accounts, configurations and applications from the old to the new environment. However, that was not the case. Instead when i tried to login to the new deployment for the first time, i had to create a new administrator account and after login i basically ended up in an empty Foundry environment.

So my questions is:

What is the correct way to upgrade an existing single-server on prem Volt MX Foundry installation on Linux to a newer version and keep / bring over all existing user accounts, configured services and deployed apps from the old Foundry deployment?

Are there any precise instructions for such a scenario? If yes, where can i find them?


BTW: In the Volt MX product documentation i found this page
https://help.hcl-software.com/voltmx/v9.5/Foundry/voltmx_foundry_linux_install_guide/Content/Patch_Installer_-_Linux.html

The page mentions a "Volt Foundry Patch installer". Is this "Volt Foundry Patch installer" the package, that is supposed to let me upgrade an existing installation from GA version 9.5.15.7 to GA version 9.5.18.1?

If yes, where exactly on FlexNet can i find this patch installer? Please provide the exact file name of the package on FlexNet, that contains this patch installer.