Thanks Kovid for this wonderful program

I just have a few tips for the coming update or 9.0 version:
1) We desperately need an "Undo" button especially when a file is mistakenly deleted or edited or something like that.
2) A one click button to switch "Title" and "Author" because the program sometimes switch them when adding books.
3) A nice and easy option to increase the memory used for the program to make it work faster because some of us deal with hundreds of thousands of books.
4) An option to edit multiple books; for example, changing the Author or book series or Tags
5) An option to use the full potential of processors like the "Intel i7"
Thanks and we are looking forward for coming releases.