Hi
I am also getting the error stated above. But it is intermittent. I tried to update a bunch of in progress stories and got that on some, others updated fine, and then I also got this: "<urlopen error [Errno 10054] An existing connection was forcibly closed by the remote host> https://www.fanfiction.net/s/9882159/1/"
I was also getting something about a handshake not working last night. All this started yesterday as far as I can see. And FFDL Standalone worked on the error'd stories but much slower than normal.
I don't know if it is anything you can do something about. I just hope it isn't something that continues. I couldn't download a story I was waiting for that finished yesterday. :P (I got it eventually after 5 tries)
And Thanks so much for this great program. I really love it. Though I think it has me spoiled now.