diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 678c3f7..9ab3c8c 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -14,8 +14,6 @@ AppWindow::AppWindow() : QMainWindow(nullptr), ui(new Ui::MainWindow()) {
   ui->setupUi(this);
   connect(ui->btnFolderSelect, &QToolButton::clicked, this,
           &AppWindow::onAppFolderSelect_click);
-  connect(ui->btnSelectPublicKey, &QToolButton::clicked, this,
-          &AppWindow::onPublicKeySelect_click);
   connect(ui->btnSign, &QPushButton::clicked, this, &AppWindow::onSign_click);
   connect(ui->btnVerify, &QPushButton::clicked, this,
           &AppWindow::onVerify_click);
@@ -28,22 +26,9 @@ void AppWindow::onAppFolderSelect_click() {
       this, tr("Open Directory"), basePath,
       QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);
   ui->txtFolderPath->setText(dir);
-  QString pubKey = checkPublicKey(dir);
-  if (!pubKey.isEmpty()) {
-    ui->txtPublicKey->setText(pubKey);
   }
 }
 
-void AppWindow::onPublicKeySelect_click() {
-  auto basePath = ui->txtFolderPath->text();
-  if (basePath.isEmpty()) {
-    QStandardPaths::standardLocations(QStandardPaths::HomeLocation);
-  }
-  QString fileName = QFileDialog::getOpenFileName(
-      this, tr("Open Public Key File"), basePath, tr("KeyFiles (*.pub)"));
-  ui->txtPublicKey->setText(fileName);
-}
-
 void AppWindow::onSign_click() {
   std::string dir = ui->txtFolderPath->text().toStdString();
   IntegretyCheck integretyCheck(dir, true);
diff --git a/ui/mainwindow.ui b/ui/mainwindow.ui
index 57b0e01..54871d8 100644
--- a/ui/mainwindow.ui
+++ b/ui/mainwindow.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>800</width>
+    <width>696</width>
     <height>375</height>
    </rect>
   </property>
@@ -16,48 +16,27 @@
   <widget class="QWidget" name="centralwidget">
    <layout class="QVBoxLayout" name="verticalLayout">
     <item>
-     <layout class="QFormLayout" name="formLayout">
-      <item row="1" column="0">
-       <widget class="QLabel" name="lblPublicKey">
-        <property name="text">
-         <string>PublicKey:</string>
-        </property>
-       </widget>
-      </item>
-      <item row="0" column="0">
+     <layout class="QHBoxLayout" name="hLayoutAppInput">
+      <item>
        <widget class="QLabel" name="lblFolderPath">
         <property name="text">
          <string>Application Folder:</string>
         </property>
        </widget>
       </item>
-      <item row="1" column="1">
-       <layout class="QHBoxLayout" name="hLayoutKeyInput">
-        <item>
-         <widget class="QLineEdit" name="txtPublicKey"/>
-        </item>
-        <item>
-         <widget class="QToolButton" name="btnSelectPublicKey">
-          <property name="text">
-           <string>...</string>
-          </property>
-         </widget>
-        </item>
-       </layout>
+      <item>
+       <widget class="QLineEdit" name="txtFolderPath">
+        <property name="readOnly">
+         <bool>true</bool>
+        </property>
+       </widget>
       </item>
-      <item row="0" column="1">
-       <layout class="QHBoxLayout" name="hLayoutAppInput">
-        <item>
-         <widget class="QLineEdit" name="txtFolderPath"/>
-        </item>
-        <item>
-         <widget class="QToolButton" name="btnFolderSelect">
-          <property name="text">
-           <string>...</string>
-          </property>
-         </widget>
-        </item>
-       </layout>
+      <item>
+       <widget class="QToolButton" name="btnFolderSelect">
+        <property name="text">
+         <string>...</string>
+        </property>
+       </widget>
       </item>
      </layout>
     </item>
@@ -78,6 +57,9 @@
       </item>
       <item>
        <widget class="QPushButton" name="btnSign">
+        <property name="enabled">
+         <bool>false</bool>
+        </property>
         <property name="sizePolicy">
          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
           <horstretch>1</horstretch>
@@ -104,6 +86,9 @@
       </item>
       <item>
        <widget class="QPushButton" name="btnVerify">
+        <property name="enabled">
+         <bool>false</bool>
+        </property>
         <property name="sizePolicy">
          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
           <horstretch>1</horstretch>
@@ -131,14 +116,18 @@
      </layout>
     </item>
     <item>
-     <widget class="QListWidget" name="listWidget"/>
+     <widget class="QListWidget" name="listWidget">
+      <property name="font">
+       <font>
+        <family>Droid Sans Mono</family>
+       </font>
+      </property>
+     </widget>
     </item>
    </layout>
   </widget>
  </widget>
  <tabstops>
-  <tabstop>txtPublicKey</tabstop>
-  <tabstop>btnSelectPublicKey</tabstop>
   <tabstop>txtFolderPath</tabstop>
   <tabstop>btnFolderSelect</tabstop>
   <tabstop>btnSign</tabstop>