After installing this new version of CA Directory, noticed that there's no reference at all to JXweb. Is there a new tool which replaces JXweb?

Release:
Component: ETRDIR

JXweb is/was part of DXwebserver/DXmanager component which will be deprecated soon.  With new CA Directory Management component/tool, there is no built in LDAP browser.

As a matter of fact, JXweb was never part of CA Directory itself. It was part of Java based DXwebserver/DXmanager component that was a separate download and install apart from CA Directory (dxserver).
You can download JXplorer (which is open source now.. donated to opensource community by CA Technologies a few years ago) from www.jxplorer.org and use to get the access to you DSAs.