This client appears to be discontinued at the time of writing this. I've checked the official website, but it doesn't appear to be available anymore. The version that you have is actually the only one available, but even so the servers are not online anymore which renders the client's usage to 0. If you don't have a master server to connect to, search queries can't be used therefore downloading will be impossible.
You can use other technologies such as uTorrent or UseNet to download the required files.
Note: For UseNet you will need a subscription on supported websites.