Yes, I got it.
I'm on late shift this week, so only just got home.

There's nothing in that archive that relates to the actual programming of the board, however it all references using version 0.9. Given everything references 0.9, it's probably wise to try reflashing 0.9.

Try following the guide at the top of this page - https://github.com/grbl/grbl/wiki/Compiling-Grbl
Download the grbl 0.9 files via this link - https://github.com/grbl/grbl/archive/master.zip
And the main Arduino IDE software at https://www.arduino.cc/download_hand....3-windows.exe

Let us know how you get on following that guide. And if you manage to establish any kind of communication with the board.