The application doesn't appear to be used anymore. I have checked the official website and nothing have found. However, if the application stored the messages on your computer, then I recommend you use Recuva. Install the application, then use the built-in Wizard to configure the scanning parameters. Once they're configured, initiate the scan and wait for the results. To improve accuracy, tick the Deep Scan option. It might take longer, but the results will be more accurate. Right click the SMS you find and restore them to another partition.