Tue, 04 Sep 2012 15:32:14 +0200 – Main Thread (2740) – Unhandled Exception: File main.inspectors not found. The Proxy Agent will not function correctly without this file.
It looks like one of the key files the management extender needs is not there… Not sure what happened to make this file disappear, but it is a required file for the proxy agent service.
I would suggest trying to uninstall and reinstall… Alternately, contact support and see if they can help troubleshoot…