Six months later... still no answer...
Actually I just bought an AudioBox a couple weeks ago and also received a Studio Magic Plugins Bundle. Trophies was included. When I registered the product I received an error message that said "an error occurred" and the page refreshed. Then I tried again, and received the message saying something like "Username or email already exist, please user another one." So I tried again using a different username and email and received a message saying something like "Username or email dose not exist, please use another one."
So I tried logging in using the first username and email, since the error message said it was already registered to that account. I will let me login, but there are no products on my download page. You would think it would be there if it were registered to that account.
I never received a confirmation email for that account either. I've checked both my inbox and spam. I have contacted Studio Linked 3 times in the past 2 weeks but I have got no response from them.