diff --git a/kcms/componentchooser/componentchooserfilemanager.cpp b/kcms/componentchooser/componentchooserfilemanager.cpp
--- a/kcms/componentchooser/componentchooserfilemanager.cpp
+++ b/kcms/componentchooser/componentchooserfilemanager.cpp
@@ -20,7 +20,6 @@
 
 #include "componentchooserfilemanager.h"
 #include <kbuildsycocaprogressdialog.h>
-#include <QDebug>
 #include <kprocess.h>
 #include <kmimetypetrader.h>
 #include <kopenwithdialog.h>
@@ -48,14 +47,27 @@
 void CfgFileManager::defaults()
 {
     load(nullptr);
+
+    for (QRadioButton *radio : qAsConst(mDynamicRadioButtons)) {
+        // selects dolphin as default
+        if (radio->property("storageId") == QStringLiteral("org.kde.dolphin.desktop")) {
+            radio->setChecked(true);
+        }
+    }
 }
 
 bool CfgFileManager::isDefaults() const
 {
     if (!mDynamicRadioButtons.isEmpty()) {
-        return !mDynamicRadioButtons.first()->isChecked();
+        for (const QRadioButton *radio : qAsConst(mDynamicRadioButtons)) {
+            if (radio->property("storageId") == QStringLiteral("org.kde.dolphin.desktop")) {
+                return radio->isChecked();
+            }
+        }
+        // When dolphin is not present, we can't assume any default value
+        return true;
     } else {
-        return false;
+        return true;
     }
 }