Opening Old Sessions That Require HALION

Hello,

I am wanting to open old Nuendo 4.3 sessions on Cubase 7. These old sessions ran the free version of Halion that has always been supplied with cubase/nuendo. As this version of Halion is now called something else, all the midi that used to point to the included halion soft synth is now pointing to a missing slot.

Any help appreciated. I think someone asked this same question recently but I can’t find it now.