Hi,
Thanks for using the Events Calendar.
Here on the pre-sales forum, I’m afraid we do not provide technical support. I would ask that you take any technical support questions across to our wordpress.org forum – our staff scan it periodically and other community members may also be able to help out.
The Events Calendar
Having said that I would look at finding a migration plugin such as this one:
WP Migrate Lite – WordPress Migration Made Easy
Or other resources to help with changing the domain of a site that is not something we can really help with as that deals with WordPress and not the Events Calendar.
Thanks again!