I have just updated the plugin to version 1.5.0. The changes are:
- Change: Handle country specific URLs in id_from_url.
- Change: Use HTTPS instead of HTTP.
The first change is for when you use the paste button in the metadata editor when a books URL is in the clipboard. It was only handling the non-country specific URL.
As usual, calibre will announce the update in the next hour or so. And if you see any problems, please report them here.