If you own an old controller (like the original Hercules MK2 or Numark Total Control) that literally only works with V7, Atomix Productions keeps a legacy download portal for registered users. You need to log into your account on their website. Do not Google for it; log in directly.
Virtual DJ 7 does not recognize modern DJ controllers. If you bought a Pioneer DDJ-FLX4, a Hercules Inpulse 500, or even a Numark Mixtrack Platinum in the last 5 years, The drivers didn't exist back then. virtual dj 7 free download old version