I’m generally quite pleased with the new version of Gajim and Fedora 30, but something strange has happened to Gajim or me: I can’t find the preferences. Am I tripping?
I think gajim optionally uses gconf depending on how the distro packaged it. So if their not hiding in any of the usual home folder dot-folder locations you may need to go hunting in the gconf-editor.
Gnome 3.x is mostly on dconf these days, so you MIGHT have to install a gconf-editor. Not sure about Fedora’s default setup there.