If you've added new contacts to your email account and want to bring them into Refer.com you can do a manual sync by following the directions below. (doing it manually is not required, the system will automatically bring it in within 3 hours, fyi).
Go to the Manage Account section of your profile by clicking on your name in the upper right hand part of the screen.
Click on Connected Accounts.
Then next to the account you've connected, click on the drop-down and select 'manual sync'.
The system will start to sync your contacts and could take up to 10 minutes to pull everything in.