How Open Project In Nios

I'm Beginner In Sopc

When Cmpile Application By Quartus 9.1 And Download Program Into De2 Board I Go To Nios 9.1 To Run C Code To De2

My Problem I Don't Know How Open Project Desined From Befor That Exist In Software Folder Where File Menue Exist Open File Just Where I Found Open Project Icon.

Thank You For All.