Enterprise Developer enables you to develop applications that run on the mainframe or offload applications from the mainframe and develop them locally on Windows. If you are upgrading from Mainframe Express, you can move your existing applications to Enterprise Developer and continue to develop them in the new environment.
Enterprise Developer includes a number of resources to help you get started with developing applications with Mainframe Subsystem support:
Once you are familiar with the IDE, you can import your existing code in Enterprise Developer.