I’m suggesting the removal of the Calibre software from the boutique.
The reason is that this installation is based on the official Ubuntu repositories that unfortunately quickly get outdated and buggy.
- Calibre has a very fast release cycle; The official repos list version 2.55 and Calibre is already on 2.85.
- A good deal of these new versions fix or improve on Calibre metadata download features due to changes to the upstream websites html (Amazon, Barnes&Noble, news sources, etc), which means older versions can quickly see their book searching and metadata filling become non-operational.
- Another reason for the fast release cycle is that the software, entirely developed in Python, has a considerable complex source code due to the insane amount of features present. This makes Calibre a hard to maintain project with a long backlog of bug and TODO list.
- The ubuntu repos installation is incompatible with the developer advised method of installation on Linux, meaning that users who installed through Ubuntu repos cannot add Calibre to the ignore list and update it manually.
- The developer himself advises users not to use the official repositories on fixed released distros (see prior link).
There are some PPAs around for this software, but none from the developer. I wouldn’t trust them to stay maintained.
The good news is that the advised manual method based on wget/python works flawlessly with Ubuntu MATE and is how I have my Calibre installed since… ever. And the whole software presents no issues with MATE, including its themeable tray icon with menu.