No information in /etc/schmooze/

I’m attempting to upgrade a FreePBX system which is running an unknown version of FreePBX. It was, at some point, updated by another administrator who used “yum update” rather than the approved upgrade path scripts.

My uname -a outputs: Linux localhost.localdomain 2.6.32-431.5.1.el6.x86_64 #1 SMP Wed Feb 12 00:41:43 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

My /etc/redhat-release outputs:
CentOS release 6.5 (Final)

Thanks in advance for any help!

That means it is not a FreePBX Distro.