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--- a/GUI/mainw/mainw.cpp
+++ b/GUI/mainw/mainw.cpp
@@ -435,6 +435,22 @@
     if (!m_overridemin2tray && settings.value("min2tray").toBool()) {
         e->ignore();
         this->hide();
+    } else {
+        e->accept();
+    }
+
+    // It seems that we still have top level widgets at this point
+    // (e.g. the menus?). Checkable with
+    // QApplication::topLevelWidgets() The app is going to exit
+    // anyway, except apparently when running some KDE desktop
+    // versions ?? So call exit directly if we see KDE. I don't know
+    // that calling exit in all cases would be an issue actually.
+    char *cp = getenv("XDG_CURRENT_DESKTOP");
+    if (nullptr == cp) {
+        cp = getenv("XDG_SESSION_DESKTOP");
+    }
+    if (cp && !strcmp(cp, "KDE")) {
+        qApp->exit();
     }
 }