Oct 03, 2015 - 07:54 PM
1) click Your Account in the upper right of the page, then once the miniature menu pops up... Click on profile.
2) On the Left side click edit profile.
3) Click on Edit Details.
4) The upper most is the username section, change this then click save at the bottom, and then you are DONE!
*NOTE: if the username is greyed out and unslecetable then it has been changed already and can't be change by that option at that time.