Just a thought that might be worth checking:

Since your internet connection is working, you could have a look at your firewall settings and make sure Poser is added as a trusted/allowed application.

If Poser (and now also the Ken1171 scripts) can't reach the license server even though you're online, it's possible that the firewall is blocking the outgoing connection.

I work in telephone support for online banking, and we occasionally see similar issues after a Windows update, a firewall update, or when security software has changed its settings. Sometimes applications suddenly lose permission to access the internet even though the connection itself is perfectly fine.

It might also be worth contacting Ken1171 directly. He may have some additional ideas, especially since the verification errors are now affecting his scripts as well.

Of course I can't say for certain that's what's happening here, but if it were a general Renderosity licensing problem, I would expect more users to be reporting the same issue. Normally the license check happens quietly in the background, so you don't even notice it's there.