The function create_projectstructure introduced in HydPy 6.1.0 was only of limited use because one still had to manually create the project's subdirectories (for example, projectroot/network/default). With HydPy 6.1.1, the different FileManager subclasses do this automatically if their base directory (for example, projectroot/network) is still empty. See (the end) of the documentation on the currentdir property for an example.