How to install device Stratix IV in Quartus Pro23.4

Hello, MARS2!

There are some devices only available for Quartus Prime Pro edition. You could see the one supported by:

https://www.intel.com/content/www/us/en/support/programmable/support-resources/design-software/devices-support.html#intel%C2%AEstratix%C2%AEseries

Unfortunately, for the device you are currently using, only the Quartus Standard edition is available.