you really need 7.4.1 - not 7.4.33? that was released few days ago..
as @johannes wrote - you can install it as additional version, or as main. But not sure if you can install exact 7.4.1 while versions.txt din't used anymore.
Guy, I really appreciate the replies. This issue is resolved.
The scripts I wrote all worked fine with 8.xx. The only thing that did not work was the contact scripts and I just bought a new one and installed it. Had I not screwed up the mx records everything would and may by now be fine. If not look for another DA beginner thread in the near future.