been told cubase 4 wont work with elektron overbridge system

anyone have knowledge of this problem?
perhaps I could download enhancements to the VST section of my cubase 4?
I was told with the new designs of VST in cubase 8.5, that the elektron overbridge is designed to work with, is there any other way to fix the problem without purchasing cubase 8.5 and keeping my cubase 4?
also, if I upgraded to cubase 8.5 would I be able to still use my wavelab 6?