If a server doesn't allow simultaneous connections, you can reduce the number of connections to that server or to a specified URL.
|1.||Open the program configuration|
|3.||Click the "Connection..." button|
|4.||Select the tab "Advanced Connection Rules"|
|6.||Enter the domain name, for example "aignes.com" (without quotes) and the limitations you want to use|
See also https://www.aignes.com/wswhelp/help_howto_limitconnections.htm