There is no difference in the installer for Xeams Community and Enterprise Edition. It will run as if you have purchased the Enterprise Edition for the first 30 days. It will then get converted to Community Edition unless a license is purchased.
Saw http://www.xeams.com/cyclic.htm
I am confused, it seems like the scenario where this happens is intentionally created by following http://www.xeams.com/FirewallSameMachine.htm
Are there new updated instructions for installing Xeams as a firewall for Exchange on the same machine, with one NIC?