I have the same question. I thought I could change templates but I've spent 2 days building the site before realising that 7.1 will not allow this. I either need to add more space across the top navigation section- somehow-or it seems I need to start again.
Plus adding tables looks like I will need to use a code generator. I joined Squarespace to get away from my rudimentary knowledge of Dreamweaver- not happy! And I can't seem to remove excess spacing between sections- S,M,L isn't enough
yellow-turquoise-4raf.squarespace.com