The NetBeans Platform Manager is a tool for registering different NetBeans platforms with the IDE. A NetBeans platform can be an installation of the NetBeans Platform or an installation of the NetBeans IDE. The NetBeans Platform Manager lists all your registered NetBeans platforms in the left pane and lists the platform that the IDE currently deploys to as the default.
You can open the NetBeans Platform Manager by choosing Tools > NetBeans Platform Manager.
Using the NetBeans Platform Manager, you can:
Once you have registered a platform, you can configure a module project to use that platform for deployment. Go to the project's Project Properties dialog box, select the Libraries node, and choose the appropriate platform in the NetBeans Platform drop-down list.