[odamizu]

Originally Posted by adrianf

I have installed the macOS-Kindle version 1.23.1 you recommeded me, and all worked fine, both in the Kindle app, and in Calibre.

I installed directly the latest macOS-Kindle 1.28 from AppStore, and, again all worked fine both in macOS-Kindle and in Calibre ...

When you say you installed 1.28 and all worked fine, was this on Mojave or Catalina or both? I.e., are you still doing everything on Mojave or have you already tried migrating to Catalina?

... What I dislike intensely in macOS-Kindle 1.28 is, the «improvement», whereby you cannot anymore disable the automatic updates to the latest version, so you are at the absolute mercy of Amazon, as to what version you use. There is no third tab in Preferences called «Updates» anymore.

This is probably because you installed from the AppStore instead of updating from within the app as I recommended. When you install from the AppStore, there is no option within Kindle for Mac to turn off auto-updates because the app will not auto-update itself. Instead, updates come through the AppStore. If you obtain Kindle for Mac from the AppStore, which I do NOT recommend, go to your macOS System Prefs > AppStore and turn off auto-updates. If you do that, the AppStore should simply alert you when an update is available, giving you the choice to update or not as you prefer.

... So I installed the other version you sent me a link to, that is, version 1.26.1 ... but a new e-book I downloaded with this Kindle version could not be opened in Calibre, being DRM-blocked.

This is probably because you switched back and forth between Amazon downloaded versions and AppStore versions. This is a bad idea and increases the risk of things breaking.

Questions:

• Are you still working exclusively on Mojave or have you already migrated to Catalina?
• When you say you installed 1.28 and all worked fine, was this on Mojave or Catalina or both?
• Is it possible to restore your ~/Library/Application Support/Kindle folder and your entire ~Library/Preferences/calibre folder to what it was when you were still on 1.17.1, before you attempted upgrading?

Once I understand your situation, I can offer more suggestions.

The same version 1.26.1 (please see the attached files for the precise build), could not even quit normally, it announced that it quitted «unexpectedly».

As I wrote in this post, using chmod -x on 1.25+ will cause K4Mac to crash every time you close the app. This is an unfortunate side effect of disabling KFX to get KF8. It is unclear if this error has any bad effects. You therefore have to choose between getting KF8/AZW3 and crashing every time you quit, or sticking with 1.23.1 and Mojave or earlier.