I think that was the wrong discussion. But I knew which one you were referring to, because that's where I found the SQL statement in the first place.  As for installing Developer, it falls under the same problem. It's ONLY for 12.0.0 now. So, it's impossible to install it. It's a Catch-22 == I need to install Dev in order to update to RC12, but I need to update to RC12 in order to install Dev.

I have a screenshot of the app + error, but apparently I'm not allowed to share it. The system considers it a link.

I wouldn't mind using the 11.0.4 versions of the apps for now. But at least it would be something.