You can not edit this bar - the first part is the name of the software version followed by the project name that you gave to the project when you saved it, then the name of the movie attached to the project. Normally the last two would be the same unless you are working on a project with multiple movies.
You can only change these by saving the project with a different name or using Manage Movies, Export to export the movie with a different name and then attach it to a different project.