Hi, hello at all people! I've a question for you: if I create a new version of my application and I prepare installer with Inno Setup Compiler, suppose that I generate a new GUID (Windows register's identificator); what Windows does when the patch is installed ? The same files, supposing i've enabled IGNOREVERSION flag, are replaced, or a backup copy remain in application folder ? And my program accesses to backup copy or new version of files ? For example: 1) the original application don't install PIPPO.DAT file, but the file is generated by the app; 2) the new patch install PIPPO.DAT file... Thank you for read! Give me e response, please.