Stratix 10 DX Production board is missing ALL examples design files

The solution to my own problem is:

Use Quartus Version 19.4 to download .sof files to the Stratix 10 DX board, NOT Quartus version 19.3 which is indicated by the board design file examples. It appears the Quartus Version 19.4 has the ".01" patch that fixes the programmer, so now the Quartus programmer can be trained to recognize the correct JTAG device chain. The user must auto detect the chain first. Then select a generic Stratix 10 DX part that most closely matches the development board part. IN my case, it will be the 1SD280PT2.

Then, press "add file" using the desired .sof file. Another device will appear, which is the device contained within the .sof file. Then delete the generic 1SD280PT2 part and make sure the correct .sof placed part (i.e., 1SD280PT2F55) is in the place of the generic part you indicated before. This is best way to accommodate any changes to the part details you may be supporting.

The .sof file should download. This procedure was tested so far with Ver 19.3, Version 19.4, and Version 21.4. Only Version 19.4 works of these three tested. In my case, using Version 19.4, the critical VID settings were defaulted to a state that works.

Here are the VID settings that work with my Stratix 10 DX PRODUCTION development board: