Hi from Germany acokegate. It looks very, very good. I hope it will function on K2i and K3. I would have a great wish for this tool: On my kindle 2 i have sorted my books (a lot of free domain books) in Collections. Inside the collections for author.
Problem: In a lot of my books the metadata for author was wrong (for example: Felix Dahn instead of Dahn, Felix.
It would be great if your tool could change metadata - only author and title - for an easy way. Perhaps you can built this possibility in your tool.