Hello. I ordered Vegas Pro 18 on amazon and received it a view days ago. I installed it today and when it asked me for a Product key, I couldn't find one. It said that there would be one on the back of the CD-Sleeve, but there isn't one there. I have been trying to reach out to some sort of Customer service, but I am unable to find anyone. I have the invoice of the product and can prove that I purchased it. Please help me get the activation key.