Cubase Essential 4 can also run HALionOne, have you tried to download and install HalionOne from the link I posted?
If you try to load a preset from HalionOne what happens, is the results box empty?
Have you tried to locate the contents?
Please read the article bellow, you will find more information about HalionOne, perhaps it helps you solve your problem:
_new/show_details/kb_show/halionone-overview.html