As the title says - all the menus etc. are in French. How do I change the default language to English??
The language is dictated by the serial number for licensed versions. Trial versions use the default system language, if their localization resources support it. If you need a different language, you would have to reinstall or use a different serial number, depending on what applies. Beyond nobody can say anything - you have not provided the tiniest shred of system information or otehr details.