The software can't update its files and database because the official website and the update servers don't exist anymore. I have tried finding an official website, but there isn't one available.
However, before giving up the program, I also recommend adding it to the Exclusion list in your firewall or Internet Security application. This will allow communication with servers, in case there is one available. Unfortunately, you will have to use the application as it is since no website is available to obtain updates.