hi carolyn
you can keep 1.4.8 as a 'fall back solution'. i have always different scribus versions on my computer. (sometimes 1.4.8 and 1.5.6 are running at the same timeā¦)
as scribus 1.4.8 can't open files edited by 1.5.x, you should keep an unchanged 1.4.8 copy of your old scribus projects.
utnik