I have the software on my other computer that I cant get online anymore, hence, I haven't printed out anything either because the printer is wireless.... ohhhhh... too long to explain! I think Brenda's size is 5" unfinished 4.5" finished. I would not change the standard on the program except when you make the triangles which have to be changed to 5" x 8" - this is the "finished size" for the triangles. Note that the unfinished size of the triangles is over 5 1/2" at the base.
I hope this answers the question?? My suggestion is to print one out and make sure that the finished size of the blocks [without the seam allowance] is 4.5"
Gus