The signlab 5 user is not able to open the file. That's the problem. I also have signlab5 myself on an older computer, and I'm not even able to open my own Signlab8 file on it. In CorelDraw or Adobe Illustrator there are options within the Save menu that allow the user to choose to save the file with compatibility to an older version of the program. Please let me know if anyone knows how to do this in Signlab.