Thank you.
I'm not formiliar with Github (as you noticed already)...
After clicking branches i found a list, then i clicked: view all branches, new list, there i selected JEM-for-Joomla-4, then i found the latest Beta version JEM 40b4
So i can upgrdae now to Joomla 4 and JEM 4 (beta)
Do you think i get a warning soon as JEM 4.0 stable is available? And will automatic update than be available?