First off, Calibre is a fabulous software, absolutely love it.
I am using Calibre 64 bit on windows 8.1.
It is a good idea that Calibre does not remove the user ebooks and thus the need to retain the Calibre library folder.
The points I mentioned earlier and below are for perfectionist, Calibre works, it is not a big thing but a perfectionist would want to a perfect software.
1. Open With
The screen below shows the "Open With" has the "Calibre e-book viewer", "Calibre e-book editor", "Calibre main program" on the list. This is with Calibre installed. If I uninstall Calibre, these entries are still on the list. It should not remain on the list, that is what is meant by Calibre not doing a clean uninstall.
2. Cannot perform custom installation on second and subsequent installations
Calibre will be more flexible if the user can customized the setup on second and subsequent installations. The customizations that are no longer allowed are clicking the Advanced button for further customization, specifyig the Calibre folder name, location etc.
