If I change a user's information, is it re-exported?

Exports contain new and modified records, so yes!

Whether a constituent supports your organization as a Participant, Donor, Purchaser or Volunteer, their profile information for the event is captured in Manage Users. User information can be read or edited from their profile to easily correct things like spelling errors, erroneous or outdated information, or updates to a previous selection.

Saved changes to the user profile will appear on the front-end, and any related Reports/Downloads. You'll also see a Last Modified By in their profile, demonstrating when the last change was made and name of the administrator who did it.

To ensure that you have always the most up-to-date information about your users, any modification(s) made will flag the record for re-export and the same constituent will appear in your next export file with the changes you made.