1. The trial version won't work because the number of links are limited. You can try using Version 9.2 but I doubt that it will generate a menu that's compatible with the latest browsers. In any event, you will have to build a new menu if you don't have the .pgt file.
Finally, unless you convert your site to a CMS like WordPress that generates its own CSS menu, I think you are going to have to purchase software and rebuild the menu for your site. If you have further questions you can contact me using the email address on the "About This Site" page of the Unofficial DHTML Menu Resource Site
BillUnofficial DHTML Menu Resource Site