Doesn't happen here: I can see them just fine.
And, it's not possible you see some docking systems and not others, they are all defined in the same file and, if you removed the actual simobject folder by mistake or lost it for some reason, the Addon Manager installer should have restored it, since it comes with the whole set of docking system objects.
Try to reinstall KLAS again, then the Addon Manager (or GSX, if you have it).