Just wanted to say a massive thanks for this plugin.
My kindle had been getting really slow recently and after some googling I came across a tip that said to use this plugin to edit kindle collections manually and remove any entries from collections that showed up as "book with no file". Am pleased to say it worked, and my kindle is back to operating at normal speed without needing to back-up all books, restore to factory settings, and then re-copy all books back on to my kindle & recreate my collections (as other suggestions online said to do).
It might not be what others use the plugin for, but it saved me hours of bother so thanks, and thanks again.
