diff --git a/GUIdataBaseLMS/mainwindow.cpp b/GUIdataBaseLMS/mainwindow.cpp
index 5ba4ac0..a71b858 100644
--- a/GUIdataBaseLMS/mainwindow.cpp
+++ b/GUIdataBaseLMS/mainwindow.cpp
@@ -12,6 +12,8 @@ MainWindow::MainWindow(QWidget *parent)
 {
     ui->setupUi(this);
 
+    this->setWindowTitle(tr("Learning management system (LMS)"));
+
     //Задаём два пункта с текстом локалей в комбобоксе
     ui->cmbLanguage->addItems(QStringList() << "English" << "Русский");
 
diff --git a/InstructorsAndTrainees/instructorsandtraineeswidget.cpp b/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
index 0deea32..de9ce81 100644
--- a/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
+++ b/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
@@ -20,6 +20,9 @@ InstructorsAndTraineesWidget::InstructorsAndTraineesWidget(QWidget *parent) :
     ui->setupUi(this);
 
     ui->btnUpdateStyleSheet->setObjectName("btnUpdateStyleSheet");
+    #ifndef PROJECT_TYPE_DEBUG
+        ui->btnUpdateStyleSheet->setVisible(false);
+    #endif
 
     qRegisterMetaType<PacketType>("PacketType");
     qRegisterMetaType<QList<Instructor>>("QList<Instructor>");
diff --git a/InstructorsAndTrainees/messanger/messangerwidget.cpp b/InstructorsAndTrainees/messanger/messangerwidget.cpp
index bead357..30c2bfe 100644
--- a/InstructorsAndTrainees/messanger/messangerwidget.cpp
+++ b/InstructorsAndTrainees/messanger/messangerwidget.cpp
@@ -19,8 +19,8 @@ MessangerWidget::MessangerWidget(QWidget *parent) :
     ui->tabWidget->removeTab(0);
 
     ui->btnSend->setObjectName("btnSend");
-
     ui->btnSend->setEnabled(false);
+    ui->editMsg->setEnabled(false);
 }
 
 MessangerWidget::~MessangerWidget()
@@ -58,6 +58,7 @@ void MessangerWidget::addTabDialogMessenger(Trainee trainee)
         currLogin = trainee.getLogin();
         emit signal_tabMessengerChanged(currLogin);
         ui->btnSend->setEnabled(true);
+        ui->editMsg->setEnabled(true);
     }
 
     //Проверяем наличие диалога с этим клиентом
@@ -136,6 +137,7 @@ int MessangerWidget::getIndexTab(QString login)
 void MessangerWidget::clear()
 {
     ui->btnSend->setEnabled(false);
+    ui->editMsg->setEnabled(false);
     listTrainees.clear();
     actualizationTabsDialogMessenger();
 }
@@ -187,10 +189,12 @@ void MessangerWidget::slot_traineeSelected(QString login)
             //Активируем нужную вкладку
             ui->tabWidget->setCurrentIndex(getIndexTab(login));
             ui->btnSend->setEnabled(true);
+            ui->editMsg->setEnabled(true);
             return;
         }
     }
     ui->btnSend->setEnabled(false);
+    ui->editMsg->setEnabled(false);
 }
 
 void MessangerWidget::slot_LanguageChanged(QString language)