diff --git a/common/util.h b/common/util.h
index 34c47fb..a790c94 100644
--- a/common/util.h
+++ b/common/util.h
@@ -31,10 +31,10 @@ private:
     bool isRequiringOutput;
     QString* requiredOutput;
     QTime timeStamp;
+    ClientType clientType;
 signals:
     void refreshOutput(const QString& output);
     void write(QString data);
-    ClientType clientType;
 };
 
 #endif // UTIL_H
diff --git a/ui/mainwindow.cpp b/ui/mainwindow.cpp
index a6ba92f..b93ff86 100644
--- a/ui/mainwindow.cpp
+++ b/ui/mainwindow.cpp
@@ -24,7 +24,7 @@ MainWindow::MainWindow(QWidget *parent):
     pm3Thread->start();
     pm3state = false;
 
-    util = new Util(this);
+    util = new Util(Util::OFFICIAL, this);
     mifare = new Mifare(ui, util, this);
 
 }
@@ -178,7 +178,15 @@ void MainWindow::MF_onTypeChanged(int id, bool st)
     qDebug() << id << typeBtnGroup->checkedId();
     if(!st)
     {
-        int result = QMessageBox::question(this, tr("Info"), tr("When Changeing card type, the data and keys in this app will be cleard.") + "\n" + tr("Continue?"), QMessageBox::Yes | QMessageBox::No);
+        int result;
+        if(id > typeBtnGroup->checkedId()) // id is specified in uiInit() with a proper order, so I can compare the size by id.
+        {
+            result = QMessageBox::question(this, tr("Info"), tr("When Changeing card type, the data and keys in this app will be cleard.") + "\n" + tr("Continue?"), QMessageBox::Yes | QMessageBox::No);
+        }
+        else
+        {
+            result = QMessageBox::Yes;
+        }
         if(result == QMessageBox::Yes)
         {
             qDebug() << "Yes";
@@ -754,6 +762,8 @@ void MainWindow::uiInit()
     }
     settings->endGroup();
 
+
+
     on_Raw_CMDHistoryBox_stateChanged(Qt::Unchecked);
     on_PM3_refreshPortButton_clicked();
 }
diff --git a/ui/mainwindow.ui b/ui/mainwindow.ui
index 5a6d38e..5603ed5 100644
--- a/ui/mainwindow.ui
+++ b/ui/mainwindow.ui
@@ -281,14 +281,14 @@
              <item>
               <widget class="QRadioButton" name="MF_Type_miniButton">
                <property name="text">
-                <string>MINI</string>
+                <string extracomment="320">MINI</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QRadioButton" name="MF_Type_1kButton">
                <property name="text">
-                <string>1K</string>
+                <string extracomment="1024">1K</string>
                </property>
                <property name="checked">
                 <bool>true</bool>
@@ -298,14 +298,14 @@
              <item>
               <widget class="QRadioButton" name="MF_Type_2kButton">
                <property name="text">
-                <string>2K</string>
+                <string extracomment="2048">2K</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QRadioButton" name="MF_Type_4kButton">
                <property name="text">
-                <string>4K</string>
+                <string extracomment="4096">4K</string>
                </property>
               </widget>
              </item>