Thanks Isaiah!
I have installed the beta and I can now see all four tick boxes. Great. Uploaded the site and it seems to work. However in my developer tools I can see two similar error messages of resources not being able to load. I guess it is due to a typo: in the source code the folder rw_common/plugins/stacks/jquery-ui-1.11.4 is written with a capital Q (which doesn’t resolve, of course).
I suppose this should be easy to solve, right?
Thanks for the quick reaction. How was the Foo Fighters gig?