diff --git a/.idea/caches/build_file_checksums.ser b/.idea/caches/build_file_checksums.ser
index 104abea..b985abc 100644
Binary files a/.idea/caches/build_file_checksums.ser and b/.idea/caches/build_file_checksums.ser differ
diff --git a/.idea/misc.xml b/.idea/misc.xml
index b0c7b20..37a7509 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,35 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="NullableNotNullManager">
-    <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
-    <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
-    <option name="myNullables">
-      <value>
-        <list size="7">
-          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
-          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
-          <item index="2" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
-          <item index="3" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
-          <item index="4" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
-          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.Nullable" />
-          <item index="6" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNullable" />
-        </list>
-      </value>
-    </option>
-    <option name="myNotNulls">
-      <value>
-        <list size="6">
-          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
-          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
-          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
-          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
-          <item index="4" class="java.lang.String" itemvalue="androidx.annotation.NonNull" />
-          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNonNull" />
-        </list>
-      </value>
-    </option>
-  </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java b/app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java
index 40e2140..5213dcb 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java
@@ -108,12 +108,13 @@ public class MainActivity extends AppCompatActivity
             firstLevelNodes.add(new TreeNode(firstLevelObjects.get(i).getName()));
         }
 
+        ViewGroup containerView = findViewById(R.id.treeViewContainer);
+        containerView.removeAllViews();
         TreeNode root = TreeNode.root();
         root.addChildren(firstLevelNodes);
         AndroidTreeView treeView = new AndroidTreeView(MainActivity.this, root);
         treeView.setDefaultAnimation(true);
         treeView.setDefaultContainerStyle(R.style.TreeNodeStyle);
-        ViewGroup containerView = findViewById(R.id.treeViewContainer);
         containerView.addView(treeView.getView());
     }
 
@@ -127,14 +128,6 @@ public class MainActivity extends AppCompatActivity
         } catch (IllegalStateException e) {
             //
         }
-
-
-        mSwipeRefreshLayout.post(new Runnable() {
-            @Override
-            public void run() {
-                mSwipeRefreshLayout.setRefreshing(false);
-            }
-        });
     }
 
     private void refreshTree(boolean clean) throws IllegalStateException {
@@ -165,6 +158,12 @@ public class MainActivity extends AppCompatActivity
                 if(response != null) {
                     try {
                         firstLevelObjects.addAll(response.body());
+                        mSwipeRefreshLayout.post(new Runnable() {
+                            @Override
+                            public void run() {
+                                mSwipeRefreshLayout.setRefreshing(false);
+                            }
+                        });
                     } catch(Exception e) {
                         Toast.makeText(MainActivity.this, "Ответ от сервера неверен! Перепроверьте данные подключения!", Toast.LENGTH_LONG).show();
                         Log.e("VRCatalog", "Answer of server is wrong! Re-check your connection credentials! Error: " +  response.message());