The official website where RoboFocus was hosted is not working anymore. I've tried to access it, but a hostname not found error appeared instead which means that the website might be out of business.
You could try to install a driver automation tool which downloads the drivers automatically, but extra precaution is necessary since it might be bundled with other applications or it could install malware or bad drivers, therefore I wouldn't recommend doing it.
The best thing right now is to wait until the main website comes online.
