How do I change the URL for my site to the new one for GC's Emails?

[Bikerstuff]

Yikes. LOL

When I first setup my Zencart store I used my existing host service and put the zencart in a sub folder so,
http://shirts-and-stuff.com/zenstore

Now I have a new domain name that goes to the store and works fine.
http://www.gearedtoride.com/

Except when I just sent out a couple GC's now the address in the GC Email is showing

visit http://shirts-and-stuff.com/zenstore/ and enter the code during the
checkout process

Gearedtoride.com goes direct to the store now, so I do not want the shirts-and-stuff.com/zenstore in any E-mails, or anywhere else really.