Question About Changing Perspectives in WSAD 5.1

In the 4.x version of WSAD - WebSphere Application Developer (Eclipse based), when you changed perspectives, it was like opening a completely different view: You could have different files opened in the different perspectives and they would not "mesh"; a file you opened in one perspective was hidden from view if you changed perspective, and only the files opened in the new perspective were visible.
I liked this very much and got used to it.
Now, with version 5.x of WSAD, if you open a file and then change perspective, the file is still there opened in your face when what I really want to do is not see it and instead see the files I opened in the other perspective.
Given that there are so many options to check and the time involved, does anyone here know how to make version 5.x emulate version 4.x in this respect?
Thanks!

The 4.x version of WSAD was based on Eclipse version 1.0; that version had the behavior you described first. The new perspective / editor behavior was introduced in Eclipse version 2.0, the base for WSAD 5.x. WSAD thus follows the platform behavior.
The closest approximation to the past behavior it to open separate windows per perspective. That's an option under Preferences > Workbench > Perspectives.
-- Dan

Thanks, Dan.