Thanks for the reply!
When I say inputs.conf, I'm talking about the one for the App itself, in the \local folder. One thing I just found - I made the edits to the file, verified that they were there, and once I restarted Splunk the file is now empty. (Note, I'm running on Ubuntu).
root@splunk:/opt/splunk/etc/apps/Splunk_CiscoFirewalls/local# cat inputs.conf
[udp://2550]
disabled = false
root@splunk:/opt/splunk/etc/apps/Splunk_CiscoFirewalls/local# /opt/splunk/bin/splunk restart
(removed startup bits)
root@splunk:/opt/splunk/etc/apps/Splunk_CiscoFirewalls/local# cat inputs.conf
... View more