There is an unsaved comment in progress. You will lose your changes if you continue. Are you sure you want to reopen the work item?
I like your tool, especially the fact that it's portable and I don't need to install anything.
But I'm curious... Why this line of code in your main form?
UPnP.OpenFirewallPort("126.96.36.199", "192.168.10.143", 80);