Help Changing My Email Address?

Help Changing My Email Address?

Hey there all,
I just upgraded but am already running into a significant glitch.  During my free trial I tested how the system works and added several users using separate email accounts of my own.  Now that I have purchased this tool and want to use it for real I need to update my user account to just be my work email address (definitely don't need work following me home.)

BUT, because I used my work email for a customer user account (which was attached to a test project that I have sense deleted) it gives the error: "Address already exist".  Can't exactly figure out where to admin that user account to delete the user or change the email address. 

Need to get this going quickly as this will become a MAJOR headache real fast.  Thanks for the help.
Taylor