I have checked the files. I couldn't replicate this freeze on my mac, but it seems to me that this is the issue that you are experiencing:
http://www.archicadwiki.com/Troubleshooting/MultipleInstancesSlowdown
So what you could try is to temporarily change the file format in all the publisher sets to pdf from dwg to see if it resolves the issue.
(Obviously disabling IPC connection in the Preferences would not let the two instances communicate with each other)
We plan to fix this problem with a Hotfix in AC 17.
Csaba Kézér
VP, Global Customer Support
Graphisoft