Doubts on upgrading SS

Hi,
I´m about to upgrade Screen Scraper from v.6 to v.7 but I have some doubts:

1) I´m going to make a whole new clean installation, my current license will work for the new version?
2) Is there a way to keep both versions at the same time in one computer? if so, my license will work for both versions or only with one of them?

Thank´s