Thank you very much for the report and I am very sorry about the experience!
There seems to be multiple issues in the thread, so I will try to address them one by one:
1. Terrible performance issues when using trace after updating to AC23 6004: We haven't received any record so far about this. There was a similar issue, but it should have been fixed in the first update of Archicad 23 (4006). It should not happen in 6004. I believe the issue comes from somewhere else. Is there a way to reproduce it, or could you share with me a sample file for testing?
2. Can no longer open an existing or new job from the AC23 Start screen: When you start Archicad and click New/Browse, what will happen? Does Archicad freeze in the background (this can be observed in the Task Manager/Activity Manager).
3. Auto Dimensioning on external walls doesn't dimension all windows: I have not encountered this issue before with the latest update for Archicad 23. Could you be a bit more specific about this?
One last thing, could you share with me the OS and the machine specification?
Thank you very much!
Technical Support Engineer