How to get an old Cubase software I used to have

Wondering how to get an old Cubase software I used to have. I can’t find the key or anything to it,
Do I need to re purchase?

I think you would need to supply a lot more detailed information to get a reasonable answer.

Hi and welcome to the forum,

It depends on the license type. If the license was sitting on the USB-eLicenser, you can just plug it in and start to work. If it was a Soft-eLicense, go thru the Reactivation process, please.