First of all thank you for the information about the link. I just did some research.
Unfortunately, Dropbox surprisingly changed the business model. I can no longer make my data public.
As soon as I find a way to download GrblGru, I will inform you here.

Many thanks also for your great video. I appreciate that very much, also because I know how much work it is to create such a video.
I hope that in the next version I will also be able to provide the possibility to use carbide inserts.