I has theme installed and shutting down site but want to keep theme

Hello,

I bought this theme intending on launching binarycoaches.com where I had it installed. I can not find any information from when I bought it, I thought I may have the theme downloaded to my PC or something.. A couple questions

1. Could I just change the domain name inside of wordpress by re-mapping to new name ? I’d like to use the theme for our church

2. Is there a way I could download the theme’s file somwhere? I can login into Cpanel but what would I need to do to download the theme?

3. If I didn’t use a hosting account, could I still run the theme using domain.wordpress.com? Or does it require a standard hosting account

You help would be greatly appreciated.. Thank you..
Dillon Kreider