diff --git a/kcms/componentchooser/componentchooserfilemanager.h b/kcms/componentchooser/componentchooserfilemanager.h
--- a/kcms/componentchooser/componentchooserfilemanager.h
+++ b/kcms/componentchooser/componentchooserfilemanager.h
@@ -43,6 +43,8 @@
     void changed(bool);
 
 private:
+    QRadioButton* findDolphinRadio() const;
+    
     QList<QRadioButton *> mDynamicRadioButtons;
 };
 
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 +47,31 @@
 void CfgFileManager::defaults()
 {
     load(nullptr);
+
+    const auto radio = findDolphinRadio();
+    if (radio) {
+        radio->setChecked(true);
+    }
+}
+
+QRadioButton* CfgFileManager::findDolphinRadio() const {
+    auto it = std::find_if(mDynamicRadioButtons.begin(), mDynamicRadioButtons.end(), [=](QRadioButton *radio) {
+        return radio->property("storageId") == QStringLiteral("org.kde.dolphin.desktop");
+    });
+    if (it == mDynamicRadioButtons.end()) {
+        return nullptr;
+    }
+    return *it;
 }
 
 bool CfgFileManager::isDefaults() const
 {
     if (!mDynamicRadioButtons.isEmpty()) {
-        return !mDynamicRadioButtons.last()->isChecked();
+        // When dolphin is not present, we can't assume any default value
+        const auto dolphinRadio = findDolphinRadio();
+        return !dolphinRadio || dolphinRadio->isChecked();
     } else {
-        return false;
+        return true;
     }
 }