The "File Bar" is a set of three icons for basic file operations:
New Project
A new project can be created at any time, but do not forget that RealFlow can only handle one project/scene at a time. So, when you decide to start with a new scene, please save your current project before you click on the icon. Then, the “Project Management” dialogue appears where you can make the necessary settings: project name, path and so on. The “New Project” tool's shortcut is Ctrl/Cmd + N.
...