[Huskey]

Can I please have some help? I moved all my books from folder A to folder B. I then opended the latest Calibre, opened the books from the new folder. No problem except all listed books refer to the old folder and also, all books were reinstalled in the old folder but not deleted from the new folder.
How can I achieve that Calibre only feeds from the new folder and books don't get copied back into the old folder?
Many thanks for your help.