Application.Run(new Form1());       

 else if (ext == ".mht" || ext == ".html" || ext == ".htm")
                {
                    try
                    {
                        richTextBox1.Visible = false;
                        scrollableControl1.Visible = false;
                        axAcroPDF1.Visible = false;                        
                        webBrowser1.Visible = true;                     
                        path =  fullPath+ "\\" + lvi.Text;                      
                        webBrowser1.Navigate(new Uri(path));                
                        toolStripStatusLabel3.Text = lvi.Text;                        
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message, "Исключение!");
                        // return;
                    }