If you want to change the factory "revert to" file, the ccf file you use must be smaller than 184kb. If it is it will become the revert to ccf. If it is larger, the original factory default file will remain the "revert to" file.

To change the "revert to" file, set Developer=1 in pronto.ini (this step is probably obsolete) and downloading the ccf to the remote with the box checked for "configuration is factory default."