No problem. I made a quick change for you. To install the change you will need to do the following.
1. Right click and save this file http://trinitronic.com/downloads/mod_ccsignup.xml
to your local computer.
2. FTP to your website where the constant contact plugin is installed.
3. Using your FTP client navigate to modules/mod_ccsignup
4. You should see a file called mod_ccsignup.xml in your current folder, upload and overwrite it with the new file.
5. Login to Joomla and navigate to the Module Manager, click into the constant contact module and verify that the "Email Address" text is gone. if it isn't delete it and hit apply.