Adobe Portfolio creator only works on original computer

I originally set up my Adobe Portfolio on my laptop. I also use a desktop computer...when I wanted to update my Portfolio on my desktop, I could not get into my Portfolio at all. It only allowed me to start fresh...but that didn't work either. When I selected to start a new project/portfolio site, it would show a blank template selection page. When I selected to start a new Welcome page, it would send me back to the "make a new portfolio page." Only when I logged on with my laptop I could edit my portfolio (or do any portfolio work). Why does my Portfolio account not work on my other computer?