Connecting after updating to Limeware 4.18

[JST.123]

I've updated to Limewire Pro 4.18 and now I can't connect to the server. I get all the standard connection 'features' as described in the help section of Limewire such as the one bar and Connecting message but it doesn't do anything after that. I have deleted and re-added the Limewire.Exe file to my security software. I have got Grisoft AVG (the full package) on the PC in question and Limewire worked before I did the upgrade.

I am told to add the listening port to my security SW but I can't find anywhere to add it. For good measure I have even disabled the firewall to see if that made any difference and it didn't (don't try this at home folks!!)

Any clues