Renaming a Running Activity
Firstly, you will need to go to the activity you want to rename. The image below shows an the activity home page.
Click on the button which says 'Rename'.
Once you have clicked on the rename button a popup dialog box will display, this will allow you to rename the activity and enter your password successfully in order to change it.
Finally, once you have clicked on 'Rename' it will take you back to the main page displaying the new name.