Migrating with Piwik

I’m migrating a Wordpress site to another host and our old setup (not done by me) has a subdomain format with piwik and the new one uses a plugin. I have put in the subdomain url (piwik.oursite.com) and token where the plugin asks for it.

The question I have is that there is no subdomain in the new location so how does that work when the domain name changes? Does the piwik plugin create a new one or do I have to manually create this and reassign it?

Also, how do I migrate my data?

Any ideas/help would be much appreciated!