In a long overdue move, FeedsAnywhere has switch to https to take advantage of SSL encryption. Thanks to the service at letsencrypt.org for enabling free certificates.
There are a few details I want to make you aware of though. Because FeedsAnywhere pulls from RSS feeds there are links to external sites and most images are delivered that way. In many cases those images are delivered over http instead of https and are not encrypted. The result is that your browser will only show the lock icon next to the URL on a page that doesn't also have external content over http.
Over time I'd expect more of the external content to get encrypted too, but until that time your traffic to and from the FeedsAnywhere server will be encrypted despite not getting the browser assurance overall.