I'm curious about whether we can use the DK-DEV-5CSXC6N to produce an FPGA design that is not time-limited by the Intel Evaluation Mode feature.

Just to clarify, the DK-DEV-5CSXC6N seems to provide details on how to invoke the DS-5 license, but doesn't appear to mention anything about the Quartus Prime license. In fact, it seems to just cover the installation of the Quartus programmer software and otherwise to advise that one can download either the Lite or Standard versions of the full Quartus Prime software. However, the Lite version the client downloaded definitely only provides the Intel FPGA Evaluation Mode for IP products, and the Standard version appears to only allow a 30-day evaluation license. The dev kit makes no mention of including a full 1-year license key, and given that such a license appears to normally cost twice the price of the entire dev kit, it seems reasonable to conclude that no such license is included. In Evaluation Mode, the presence of the IP products in the client's design makes it impossible to convert the SOF into a format suitable for programming into the boot flash, and Quartus says the IP included in the SOF will become inoperative 1 hour after uploading to RAM.

So, what is the actual substantive meaning of your previous response? Is it intended to suggest that I could download and use the Quartus Prime Standard and use it for 1 year so long as we don't include any Intel PSG IP modules -- and that we only need to purchase a separate license if I do include such modules? Of does it have the constraint of only being loadable to RAM even during the 1-year period with or without including Intel IP?