Hi Peter 1977, the GUI is just a batch builder app that sits on top of the Mobi2Mobi Perl tool. I have not made any significant changes to the GUI as the underlying tool has had no major updates for sometime. If you would like to see some changes made to Mobi2Mobi then I would recommend that you ask in the Mobiperl thread as the author of the tools frequents there more regularly. Feel free to grab the code to the GUI though and have a tinker. If you make any interesting mods let us all know here.