The main project name cannot be changed. This is a security feature to keep you from accidentally deleting or corrupting your project database. We suggest using your client's name and event; something that makes it easy to identify.
Currently Album Builder, Gallery Designer and Card Designer are the only modules that have the option to change the subproject name, here is how!
Locate the Subproject you want to rename
Open your Module Options Window
Enter the new album name and save changes to continue.