I have just release version 1.13.0 of the plugin. This will make the plugin compatible with Python 3 and calibre version 5. There are no changes in function in the plugin.
The release notes for this version are:
- Update: Changes for Python 3 support in calibre.
- Update: Internal changes to how dialogs are handled.
Calibre will announce the update in the next hour or so. For those already running calibre v5, you will probably not bee notified of the new version. Install the update using the plugin updater.
If there are any issues, please report them here.