It's important that your email campaigns have a unique name, and you will get an error if you try and create a new name and give it the same name as a pre-existing campaign.
However, once you have named your campaign, you can change it's name using the following steps:
Access the Campaign Management screen in Enudge by clicking 'Campaigns' in the main navigation.
Click on the 3 dots icon, to the right of the campaign tile.
Choose 'Rename' which is at the top of the options.
Type in your new name in the field that will open in the tile.
Click Save.
Voila! Your new name will appear in the list of campaigns.
If you happen to enter a name that has already been used, Enudge will add an underscore and a number to the end of the name, to enforce uniqueness.