Currently unable to change the default boot for kali linux 2 grub 2.02 launcher.

It says windows 10 is windows 8.1 (loader) but ive tried setting it to the whole "windows 8.1 (loader) from /blah/blah/blah".

to no avail. I swear last time i set this up i could use the grub loader on launch and tell it to set the default os.
Is there a command or way i can enter that from the grub load up screen?