Between installations I had fragmented my own Dimension Pro folders by installing versions/sample libraries in different locations. I ended up finding all of my Dimension Pro->Mutlisample folders and assembling them all back together and putting that folder back where X3 was defaulting to (for me, was the C:\Program Files\Cakewalk\Dimension Pro\Multisamples folder). I ended up having "piece parts" of Dimension Pro installed on other drives so they never showed up in the program list.
Edit: I have a "Hollywood Edge FX" folder, but never had 8.X, so picked it up someplace (no idea where though).