You are able to edit the details of your conference as many times as needed prior to your event. Please note that the address of each individual course will not be automatically updated by updating the conference details.
To Edit...
Step 1: From the navigation menu select "Conferences" then "Manage My Conferences"
Step 2: Click the pencil action icon 
Edit Record associated with the conference you want to edit under the Manage button
Step 3: Make your changes
Step 4: Save