Hi Rikky!
Now I see what's going on! [;)]
The Special Edition PLUS sound set only works with the PLUS matrices. If you want to use the normal Special Edition matrices you will have to load the normal Special Edition sound set. And if you want to combine them activate one VE instance with the Special Edition sound set and one VE instance with the SE+ sound set. I'm sure neither Paul nor myself told you anything contradicting to that. So it must have been a misunderstanding. I don't know what you are concretely refering to, but I guess what was meant is that in the sound set and the matrices for the SE+ the articulations of the normal SE are also included.
The program for the orchestral doublebasses is called "Doublebass ensemble" in the Special Edition sound set and "Doublebasses orchestral" in the Special Edition PLUS sound set. It should be in the list. Which sound set are you exactly using?
Best wishes,
Andi
Vienna Symphonic Library