diff --git a/src/renderer/src/workspace.js b/src/renderer/src/workspace.js
index e20727a93..a053cbfbb 100644
--- a/src/renderer/src/workspace.js
+++ b/src/renderer/src/workspace.js
@@ -70,6 +70,7 @@ angular.module('workspace').controller("WorkspaceController", ['$scope', '$rootS
             } else if (isPracticalCourseMode === false) {
                 isPracticalCourse = false;
                 myProject.setMode('default');
+                settingForDefault();
             }
 
             myProject.isSavedPath = storage.getItem('defaultPath') || '';
@@ -969,6 +970,11 @@ angular.module('workspace').controller("WorkspaceController", ['$scope', '$rootS
         hwCategoryList = EntryStatic.hwCategoryList;
     }
 
+    function settingForDefault() {
+        defaultInitOption = {};
+        hwCategoryList = [];
+    }
+
     function addSpinnerPopup() {
         $scope.popupHelper.addPopup('workspaceSpinner', {
             type: 'spinner',
diff --git a/src/renderer/views/header.html b/src/renderer/views/header.html
index a7f25f0d1..30e79c356 100644
--- a/src/renderer/views/header.html
+++ b/src/renderer/views/header.html
@@ -16,7 +16,7 @@
         <div class="workspace_language">
             <ul class="language_wrapper" ng-if="PracticalMode != 'practical_course'">
                 <li class="dropdown" uib-dropdown>
-                    <a href class="dropdown-toggle" uib-dropdown-toggle>
+                    <a href class="dropdown-toggle" data-toggle="dropdown">
                         <span class="menu">{{user_language | text}}
                             <b class="caret"></b>
                         </span>