change the default program on a max 10

See the 'max 10 fpga configuration user guide (https://www.altera.com/literature/hb/max-10/ug_m10_config.pdf)'. To "change the default program on the FPGA(max10) while you plug it" you need to re-program its Configuration Flash Memory (CFM). See chapter 2 in the above document.

Thks Alex, is configuring flash memory includes programming the nios too, or there another method to do it ?