I am new to this software although I have had older versions for some time. I am currently using the latest version. After setting up 20 min of slides, I selected "Save As" with a date as a project number. I closed the program (running Win 7-64 bit)and went off listening to some music to add to my slide show. I started PTE again, my slides were still present, previewed the music selection with the slides and closed the program. The program asked if I wanted to save the changes and I clicked "No". I started the program the next day, my slides were missing and I could not find my project listed anyplace. I have the slides copied to a DVD but I would think the program would save the files. Help, if possible. Much thanks!