diff --git a/helper/shortcut.cpp b/helper/shortcut.cpp
index 5edaf79..1ef47a7 100644
--- a/helper/shortcut.cpp
+++ b/helper/shortcut.cpp
@@ -32,13 +32,14 @@ ShortCut::ShortCut(QObject *parent)
 
 void ShortCut::install(QObject *target)
 {
-    if (m_object) {
-        m_object->removeEventFilter(this);
-    }
+    // No need to remove, because memory space is automatically freed in qml.
+    // if (m_object) {
+    //     m_object->removeEventFilter(this);
+    // }
 
     if (target) {
         target->installEventFilter(this);
-        m_object = target;
+        // m_object = target;
     }
 }
 
diff --git a/qml/FolderGridView.qml b/qml/FolderGridView.qml
index 0482aa2..1c09e8b 100644
--- a/qml/FolderGridView.qml
+++ b/qml/FolderGridView.qml
@@ -27,6 +27,8 @@ import FishUI 1.0 as FishUI
 GridView {
     id: control
 
+    objectName: "FolderGridView"
+
     property bool isDesktopView: false
 
     property Item rubberBand: null
diff --git a/qml/FolderListView.qml b/qml/FolderListView.qml
index 9903f85..283880f 100644
--- a/qml/FolderListView.qml
+++ b/qml/FolderListView.qml
@@ -26,6 +26,8 @@ import Cutefish.DragDrop 1.0 as DragDrop
 ListView {
     id: control
 
+    objectName: "FolderListView"
+
     property Item rubberBand: null
     property Item hoveredItem: null
     property Item pressedItem: null