Sorry about not being around and responding.
Yes, this is an official release.
Yes, DX4 is going to be stripped down to bare bones and then rebuilt better than ever.
Yes, this is the Pro version and the standard version is coming.
No, we are not going to be able to hit everything on the wish-list thread and not everything right away.
Plugins have been moved so that there are not security issues with them
Widgets and objects and gadgets and graphics have been moved to the standard locaation for Stardock apps.
Right-click options have been added to make creating new things easier.
Sidebar gadget export have been removed (since MS has dropped the sidebar in Windows 7 as a failure in Vista and what were sidebar gadgets can now be anywhere . . like objects/widgets/gadgets). One less thing to support so better features can be added.
Expect more builds in the near future and know that we are listening.