Domain Name Change

Domain Name Change

I wasn't sure which forum to post this in. Figured I'd try mail since that's what I'm using primarily in Zoho.

I'm using a free Zoho account. I sent it up on a test basis connecting it with a domain I don't actively use. Being pretty satisfied with it, I'm thinking of connecting my active domain.

Is there a way to change the domains withing the present account, and, if so, how?

Or does make more sense to start from scratch with a whole new Zoho account? 

Thanks