Going on a hunch here, suspecting that there may be some sort of permissions issue going on here preventing the original from being deleted; I've seen similar issues with other applications that was attributed to this.
What operating system are you running?
EDIT: I tested my theory by opening a PDF file so it was locked in-use and attempting to change the author. Calibre told me it was unable to move the file location. So maybe I'm a little off on this.
Last edited by ownedbycats; 10-12-2018 at 07:03 PM.
|