I'm getting messages that my start up disk is almost full and am wondering if perhaps that's related to keeping both Year 1 DE and Year 4 DE on my desktop. I could just delete Year 4 and re-install when I need it again in 3 years. It seems kind of scary to delete it though. I'm wondering if I could put it somewhere on my Macbook HD other than on my desktop but am not sure how to do that. Would anyone be able to help me?