Going from trial to paid: When does/did 5-day limit on domain name change start?

Hi:

I've searched the forum for domain name changes, but haven't quite found an answer to my question.
 
I'm helping my daughter with her SquareSpace website, created in her Art Portfolio class.  She started with a trial subscription more than a week ago.  Four days ago, we upgraded to a paid subscription for the year, but she wants to change the domain name.
I've looked at the help section on SS and have read that the domain name can only be changed within the first 5 days of creation.  I'm assuming that (for her) this means from the start of the trial period, but thought I'd ask in case it starts from the point of paid subscription.
I really don't want to buy another domain at this point, so if we cannot change the name now, would the next best thing be to wait until almost the end of this subscription period and then buy a new domain and make it the primary?
Thanks for any advice.

Thanks Paul. 

Do you know if the 5-day grace period starts after the paid subscription starts or after the trial starts?  She created the website over a week ago with a trial subscription, so I'm not sure if we can still change the domain name since it's been longer than 5 days.  We only upgraded and paid for a full subscription this past weekend.

I would typically see a Squarespace customer build their site during the 14-day free trial without paying anything. They'd then obtain a free domain name when they purchase an annual website plan from Squarespace, or purchase a domain name if they are purchasing a monthly plan. If this is what you've done, the grace period is from the registration date.

For more information, you can contact Squarespace Customer Care.

Ok, thanks. She created a name when she started the free trial period, but it sounds like she might still be able to change it if we just purchased the plan this weekend. Today or tomorrow would be the last day.

Thanks for your help and the contact link.