See these two separate blog post announcements for more details:

https://blogs.embarcadero.com/getit-update-additional-rad-studio-12-getit-packages-are-now-available/

https://blogs.embarcadero.com/rad-studio-12-athens-patch-1-available/

Getting it back and hosted on AWS was fairly intensive work

Feb 12 Update

A new build of RAD Studio 12 has been release, see more information at https://blogs.embarcadero.com/getit-update-rad-studio-12-getit-online-installation-is-now-available/