I receive the error message:
I am running Windows 7 with Administrator privileges. How to download GRBL Controller 3.6.1?
Indeed, the link on their official website is not working anymore. I have tried to access it in different ways, but it was impossible. However, you can download the attachment from the GitHUB website which is in TXT format. Save the file on your computer, then change its extension to ZIP and extract it. I have done as instructed on the page, and it worked normally.
Download page: https://github.com/zapmaker/GrblHoming/issues/108