bu adreste vbulletin lisans sözleşmesi yer almaktadır

vBulletin® - License Agreement

şöyle bi ibare geçiyor

• Jelsoft may, at its discretion, allow you to transfer your Software license to another party, providing the license:
  • has not already been transferred in the previous 12 months; and
  • was purchased more than 3 months in the past.
  • is an active owned license

satın aldıktan sonra en az 3 ay geçmiş olmalıdır diyor yani