The connection problem may be caused either by your Windows Firewall, or by your security program. In order to solve it, go to Start > Control Panel > System and Security > Windows Firewall > Allow a program through Windows Firewall and check the box next to the program. If you can't find the application in the Allowed programs and features window, press the Allow another program button, navigate to the installation directory, select the executable file and press Add. After that, from the Advanced Settings select Inbound Rules > New Rule. Check the Port box, click Next, select All local Ports and follow the self-explained steps. Next, make sure that your antivirus doesn't block the connection. If it still doesn't work it is possible that the software's servers may be temporarily down or under maintenance. In this case you will need to wait for a while. If none of these helped, I suggest you upgrade the program to the latest version.