If you havent yet, Check in your account where your RE licenses are and, look for the "manage licenses" button.
Follow the seps thru there (should just prompt you)
On the other hand, If it is "try" mode, that needs internet authorization. (logging in to Reason)
you have "buy" the free ones! its still free but, the button is labeled buy,I think.))
Hope that helps! Keep us posted.