Silver, XDE prompts DataModeler.dll failed to load, search with Google, find a related reason:
http://www-1.ibm.com/support/docview.wss?uid=swg21149536
After installing XDE, I found that XDE's COM component registration is all, this installer is too irresponsible!
I can't take so much, first delete HKLM / Software / Rational Software, HKCU / Software / Rational Software, find a new MS Java VM (http://www.softwarepatch.com/windows/javavm.html) On, then XDE, you can get it.