Several programs in Xfce have a daemon mode call gtk_init() before fork()ing. This is unsafe, and when it goes wrong this will typically manifest as the daemon hanging shortly after forking, and appearing to simply do nothing at all.
Appfinder was ported to GDbus, so this problem should be solved: 4a065a10945c72c985e254ff1ef13df188f3e11e Released in 4.11.0
*** Bug 11037 has been marked as a duplicate of this bug. ***