Hello all,
when you open a book in Calibre, it will be saved to the default location that was set in the application.
Conversely, we can start the editor alone, which allows, for example, modify a book lying in any location and save it in the same place (I don't know if it's very clear ...) .
The problem (small problem) is that we can't drag and drop a book directly in the editor: use the "open" icon and get the book in the tree.
I use the editor in this way (without launching Calibre front) with Linux to make small changes in epub, and I record directly to their home directory.
I use the portable version with Windows.
Que la force soit avec vous