If reverting from a Clustered configuration, one solution is to back up the data, install a new stand-alone, and restore the data. This is the recommended approach. An alternative is to set in confluence.cfg.xml:

<property name="confluence.cluster">false</property>

To check to see if clustering has been disabled, look in the logs after the xml during startup. In your catalina.out, you have:

INFO [KB:main] [KB:confluence.cluster.tangosol.TangosolClusterManager] startCluster Bringing up cluster service

This line won't exist if you start it up with the config we gave above. That's how to test it.