This warning clearly suggests what you need to do. As I understand from this picture, device doesn't care how navigation folder and .exe is named, because you have to set path to navigation manually. There should be "Navigation path" option somewhere in the options menu of your device where you can set it..So in those cases you can put Primo on a SD card, than set the navigation path to SDMMC\Primo\Primo.exe (just an example)