Hello @IATC ,
When you click the "Download CSV" link at the top of the registrants list, it should download with the basic registration info (registration status, payment status, first name, last name, email, date of signup). Since a lot of spreadsheet programs have a default width to their columns, you may need to expand them a bit to see all the info downloaded in full.
You can also select the Reporting tab on the event's dashboard, and then export a custom or full report. If you select custom report, you'll need to select what info you want exported.