Keep getting this error message

I am copying the instructables project with building an arduino laser engraver. I have downloaded the Arduino IDE and GRBL. The instructions said to replace the config.h file with the FT5YLHDID77MXTS.h file. I am going to "Sketch" and selecting "Include Library" and then selecting grbl. When I try and upload it tells me this error.

OMG please help, I've spent days trying to figure this out. Also when I hit CNTL+SHIFT+M I get the correct screen but $$ doesn't do anything.

This is the error message when I hit upload.

In file included from D:\Documents\Arduino\libraries\grbl/FT5YLHDID77MXTS.h:30:0,

from D:\Desktop\Arduino Program Files\grbl-1.1f.20170801\grbl\sketch_feb22b\sketch_feb22b.ino:5:

D:\Documents\Arduino\libraries\grbl/grbl.h:42:20: fatal error: config.h: No such file or directory

#include "config.h"

^

compilation terminated.

exit status 1
Error compiling for board Arduino/Genuino Uno.

You were supposed to rename FT5YLHDID77MXTS.h to config.h. The reason it has that weird file name is because Instructables gives random names to all files.