I've had various versions of Qimage over the last 15 years, and in some of the older versions when I print to file, it added a {Q-P} prefix or a Q-P prefix, and would ask if you wanted to delete those files before printing new files into the same folder as those files.

The current version still asks if you want to delete the files with the prefix before you print new files into that folder, but it isn't adding the prefix so files are starting to build up.  How do I edit the prefix? I want Qimage to ask me if I want to delete files with the prefix every time I print new files to the same folder.