Yes, I am using the S10 MX dev board.. And using the BoardTestSystems.exe GUI discovers the board and loads the FPGA with the different configurations. And yet I can't use the Quartus download manger to do so.
Strange. So I presume your Quartus project is set to the correct device. When you open the .sof file in the Programmer, does the correct part number appear? You don't need to use the auto detect (you can select any part in that list) if the targeted part shows up correctly in the Programmer extracted from the .sof.
It is working now.
These are the steps:
Point 2. was confusing, but once you mention that I can select any part and it should just work, made me experiment a bit.