I created a bandlab Account but there is not a single registered product.
So where are my registered products on the bandlab Website?
Thanks!!!

That has not happened yet. For any of us. But they told us that in one of meng or noels posts.

It would be nice if people would take the time to read the stickies at the top. 
 
Cakewalk by Bandlab is a new product and that is all that is there at this time when you run the Assistant.
All you Cakewalk products from Roland and Gibson era are still in your "my Products" and in Command Center. 
Take the time to read relevant threads as it's important to your future with Sonar and now Cakewalk -Bandlab to not sleep through these changes. 

Thanks.