How to rename a project?

In the All Projects View, find the project that you want to rename, then in its card, click Actions > Settings.

This will redirect you to the project's settings page where the option to rename resides.

Alternately, if you're already inside the project you want to rename, simply go to its Dashboard then click Settings.

From there, click the Change project name button.

This will bring up a dialog box where you can provide a new name for the project. 

Give it a new name, click Save, and you're done!