Yes i see, according to the wiki there should be a icon there for guardian as refered on the link below:http://wiki.ipfire.org/en/configuration/services/ids?s
Under Services it is showing Guardian service running.
Is your situation anything similaron the GUI as well ?
I also checked the same folders you did and the result is the same as yours.
I am running Core 109 fresh install.
I was trying to file a bug but I cant find the right component .