This question has been answered by iusemodx. See the first response.
Hi, I just updated a modX installation from 1.2 to 1.2.1 after site hack - 1.2.1 unfortunately was the latest version I found at first search
I think if we want to stay with modX Evo we should move on to Evolution CMS.
What is the "best practice" way to upgrade a 1.2.1 installation to 1.4.6?
Regards, Martin Lindenlauf