My dad said he was looking online this morning and searched "import stu file." He found this site:

http://www.reviversoft.com/file-extensions/STU

It says that “Pinnacle Studio HD 15” will open a stu file.

At http://pinnacle-studio.soft32.com/ you can download the program for a free trial. Do you think it would be worth a try?

If this method will work could I open my STU file in "Studio HD 15" and save it as an STX then open it in Studio 19?