@ FF2 - If you drag a whole folder into a collection, it will add all books in that folder to the collection, (any books in that folder already in the collection will stay in the collection without duplication). You can drag books (and folders) into as many collections as you have.
@ PaulinAfrica - I'm awfully sorry you found a bug, Any chance you kept the buggy collections.json file, as if I have a look I can probably fix it and find out what happened.
Also, the software should create a backup folder with your old collections.json file in it, just in case a bug occurs (it might be a simple question of a character in a book name that it doesn't like - although I organised 1000+ books on my kindle with it I have not tested for all possible input as I do not have the time to do this).
And by the way, I cannot see what books are on your kindle if you send me your collections.json as the names are encrypted 1-way, i just need to be able to see the structure of the file to try and find the issue.
@Kindlevarazs - looks good might check it out. Also yes, please start your own thread so I can spam it with details of my app
