Floh,
No older importer installed, In fact, I wrote over the older one when I installed this one. So, you are using CS3, yes? This isn’t CS4 only. I am running AE on a separate box (intel 10.4.11, QT 7.4.1, AE 8.0.2)
Once AE launches after the error message, you just can’t read in XML files.