It looks like you have to do all style changes in the editor now on 7.1. If you actually want a complete template you have to downgrade to version 7.0 by starting a whole new site. Otherwise you can adjust each setting, fonts, colors buttons etc one by one to get the look you want. Seems like a big mistake on the part of Squarespace to change this, a great feature was being able to pull in a template that you like and tweak things.
I bought an annual plan, want to use 7.0 but am stuck as they wont refund the annual plan after 14 days. . . . not happy