In Eclipse there is a thing called "perspective" which is like a template for which views and windows to show.
There should be a Fuse perspective in Eclipse. So if you can find the menu how to change perspective, then in the list there should be a Fuse.
Also I uninstalled the Fuse IDE using uninstall.app and removed the folder from apps, but when I install it back I see the old settings. Is the way to completely uninstall it and have fresh settings when I install it back?
Yeah I have noticed that too. That Eclipse somehow has a "magic" directory where it stores past configurations.
It's an Eclipse thing, so if you google you may find people talking about this. And how to completely clean previous Eclipse installations.