1. Launch xfce4-appfinder --collapsed 2. Enter !wicd-curses xfce4-appfinder will not launch wicd-curses in a terminal, it would direct to a web browser searching for "icd-curses".
Andre Miranda referenced this bugreport in commit 1a3f73b1230de0904aec41601ae7a48b7244e19a Change default action conflicting pattern (Bug #12103) https://git.xfce.org/xfce/xfce4-appfinder/commit?id=1a3f73b1230de0904aec41601ae7a48b7244e19a
I changed from "!" to "$", it affects only newly installed systems and users can always edit the pattern to the old one.