Hi, Francois,
I am reading the tutorial about DBA source estimation. But after I followed with the process of the tutorial, I found that my menu didn't have some options like turotial's. I could not find the 'compute head model' in my menu.
Below is mine:
It seems that you are looking at the anatomy side of your protocol.
To compute the source, you need to be in the functional tab (check attached figure).