Ricky, from your screenshot, it looks like that blank username at one time was associated with Jay Radio. If that username account folder still exists (but is not currently accessible) you can change the blank name attribute to the corresponding folder name for Jay Radio. Restarting the service should fix that issue.
If you no longer want the Jay Radio folders (if they exist), you can remove them and the <Address> entry in the xml. Again, restarting the service will stop the blank user from appearing.
Let me know if you have any further questions or concerns on this matter.