I purchased a theme. Downloaded the theme and registered it. Long story short what I had started got deleted. So I am having to start over, but now when I go to register the theme and it tells me it’s already registered to the domain name I’m working on. Can I delete that and register the new site?
To use purchase code (license) again which already used for any website (mean theme license already registered) you have to unregister/deactivate the theme license from the old domain/website. you can not use the same purchase code (license) for more than 1 website.
If you don’t have access of old website wp-admin where the theme registered/activated then you have to contact theme author and request them to unregister/deactivate the theme license from the old domain/website.
contact the theme Author and let them know How to Contact your purchased theme Author, the theme author will be happy to assist you within their scope.
Bear in mind, the author may ask you to purchase another copy if you’re changing the domain name as Envato terms are clear about that 1 licence = 1 domain.
Yes, You can delete that
It will be beneficial for you