how to add hex file into design file to compile

I have a memory initialization file that is referenced in ROM altsyncram megafunction

init_file = "C:/Project/...../File.mif"

and when I open the mif file, it states "Quartus II generated memory initialization file (.mif)" As you mentioned before, I would just need to place both the hex and the mif files within the same directory and quartus will automatically recognize the hex file. But the problem that I see now is, every time I have a new hex file, the mif file doesn't automatically update when I compile. So what are the steps I should take to have quartus update the mif file whenever I add the new hex file? As far as I see, compilation does not update the mif file.