ref: some changes

* change hash process
* add commands for version

mainwindow.cpp

@@ -473,6 +473,14 @@ void MainWindow::on_unsafeChangingButton_clicked()
 
 void MainWindow::on_exitButton_clicked()
 {
+    workerThread->quit();
+    workerThread->wait();
+
+    emit sigSendXMLAnswer(cmd_Disable);
+
+    delete workerThread;
+    delete ui;
+
     exit(0);
 }