I have just released version 1.10.0 of the plugin. I should have done this before, but kept forgetting. The release of calibre 4.0 has triggered this release a it has a change that breaks this plugin. I'll be fixing this soon, but am making this release as the last version to support calibre 3.x and earlier.
The changes in the plugin are:
- Change: Add PDF as supported format for Kindle devices.
- Fix Kobo: Not getting annotations for kepubs if filename contains spaces.
- Internal Change: Use rowfactory and names in database.
- Fix: Some issues with merging with existing annotations.
All of these changes are in the beta releases.
As usual, calibre will announce the update in the next hour or so. And if there are any problems, please report them here.