What I can do is renable the Convert button and uncheck the tick boxes for the Book Title, Author, Publisher & Image boxes. You would then have to recheck the field you wanted to change and then reconvert. The other way would be to load the newly converted file after a convert and then you make then changes. Essentially the GUI would do the Open File for you. I'm leaning towards the later as you get the latest information stored in the MOBI file and don't run into potential old data in the various fields. I'll look at it.