The wording is unclear.
you mean:
update, then installing filezilla ?
or you mean
you installed filezilla, it worked, then after the update it no longer did ?
Hmm, looking into it further, it appears Filezilla depends on the wxgtk-common-dev version (or at least something else installed it and counted it as plain wxgtk-common ???).
What I ended up doing was this:
(Using pacman in terminal, the GUI pamac didn’t resolve this very cleanly)