Just follow these steps:
Click on the MY CONTEST tab and select the contest where you'd like to edit your entry name.
Locate your entry — next to your entry (e.g., Entry 1), tap the 3 DOTS
Edit and save — a pop-up will appear. Enter your new entry name and tap SAVE.
Commissioner do not have the ability to edit members entry names.
Note: You must be logged into your account to edit your entry name. Entry names cannot be changed after a contest has started.