hätte ich vorher machen können; starten geht offenbar mit ./electrum: darauf folgt:
lubuntu@lubuntu:~/Downloads/Electrum-3.1.3$ ./electrum (python3:3234): dbind-WARNING **: 20:34:41.281: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files QApplication: invalid style override passed, ignoring it. Gtk-Message: 20:41:07.456: GtkDialog mapped without a transient parent. This is discouraged.
Electrum startet aber !!!