private void UpdateFilePath_Click(object sender, RoutedEventArgs e)
 {
     try
     {
         ConfigurationManager.AppSettings["filePath"] = fullFilePathTB.Text;
         if (FileWatcher.MyFileSystemWatcher != null)
         {
             FileWatcher.ChangePath(fullFilePathTB.Text);
         }
         System.Windows.MessageBox.Show("Filepath changed.");
     }
     catch (Exception ex)
     {
         System.Windows.MessageBox.Show("Error occured; ErrorMsg: " + ex.Message);
     }
 }