You need to launch the Dimension Pro plugin from within Sonar.
Then, as stated above, click in the program load area (patch window) of Dimension Pro interface, and press press F5 -
This forces Dimension Pro to rescan the program list and update the patches you can choose from.
Provided you accepted the default's when you installed the DSF add-ons, everything should now be visible.
You'll need to do this (once) anytime you install add-on packs for Dimension Pro or Rapture.