closest to VST/32 version 5.1

Hi, due to forgetting my serial number I need to buy a new version of Cubase, can anyone tell me which would be the closest to what I’ve been using please. The instalation disk reads
cubase VST
Cubase VST Score
Cubase VST/32
version 5.1

I don’t need anything to do with scoring just the same recording map and mixers etc so I don’t have to start a whole new learning curve and can still import my old multi tracks.
Thanks for any help,

Not going to happen. VST/32 went to SX, which was a pretty big change. It really isn’t that hard. Just go current.