Setup issue

[LarryM]

It sounds like you have wiped out grbl. You will have to reflash the Arduino with grbl.

https://inventables.desk.com/customer/en/portal/articles/2069033-grbl?b_id=9563

Or you can use this:

[Reference thread] Alternate method for .hex upload

Update 12/29/2015 It appears that this doesn’t work on Windows 10. I don’t have Windows 10 so I can’t try it, but another forum member tried it and it didn’t work for him. Updated 12/12/2015 Revised method for uploading a .hex file to the Arduino. This is an alternate method for uploading if you have difficulties with Xloader. This version prompts for the COM port and filename. **** Readme file 12/12/2015 **** To use this .zip file to load a hex file into your Arduino you first need to copy…