If you created a review cycle and you want to change it's name, you can do so even after you've launched the review!
To do so:
Step 1: Navigate to the "Admin" panel found on the top navigation bar
Step 2: On the left Administration panel, select "Reviews"
Step 3: Find the review you would like to change the name of, and click into it:
Step 4: Click on "Settings" in the top right corner of the navigation bar
Step 5: Change the "Cycle name"