Follow these simple steps to manage your profile.
Go on Your Account at the top right corner of your screen
Click on Account and profile amangement
Now click on Profiles & Roles from the menu on the top
Next to the profile name is displayed the Manage button.
By clicking on it you will be able to perform the following actions:
edit the profile name
set the profile as Primary
delete the profile (scroll to the bottom)
Deleting a profile
Deleting a profile is always possible unless it's the profile set as Primary.
If you want to delete your Primary profile you first need to set another profile as primary.
To do so, go on Manage Profile of the profile you want to set as primary and click the button Set as Primary Profile.