Show main window doesn't work in qt version
Open audacious in qt mode:
I managed to fix this problem by using
audacious -m --qt && wmctrl -a audacious
The show-main-window option does not work with the qt version. It DOES work with GTK version on a KDE system though.
KDE NEON 64bit 5.11.5 KDE Framework Version 5.42.0, QT Version 5.9.3
Audacious 5.9 (stable)