Prior to the start of your Meeting/Event, you can run a report of those who registered for your Event.
From the Dashboard, click on the Reports tab
Select the Upcoming Meetings button and the date range of the event.
Under Quick Sales Stats click on the Upcoming Meetings square and choose Meetings by Name.
Next you will see the Meetings scheduled for the time range you specified.
To view the list of registrants, click on the number of registrations out to the right of the meeting name. To download the file into Excel, click on the gold download button to the right of where it says Meeting Registrations.