Once upon a time I believe that when a customer registered their product,
they were automatically granted access to that product’s support forum. (if it wasn’t automatic, there was a very fast turnaround)

That said, if you are not a registered owner of SD3,
you’ll probably want to search/read the threads and post your questions in the SD3 Pre-Sales forum.

If you are a registered owner of SD3, please contact Toontrack Support directly by going to the FAQ
and click the ‘Contact Support’ button at the bottom of each FAQ page to request access to the SD3 Support Forum:
https://www.toontrack.com/faq/how-do-i-contact-support/

@OnlyLeura said:
I’m a registered owner of SD3, because I registered my Sweetwater purchase of SD3 with the “Register New Product…” function in Product Manager, using the serial number provided in the Software Activation Instructions e-mail from Sweetwater. So, I’ll just use the Contact Support button in the FAQ. Thanks, Scott.  

Same here. Registered the Crossgrade to Superior Drummer 3 in the Product Manager, but haven‘t got access to the SD3 support forum, only the Pre-Sales subforum. Can one of the admins please unlock the forum for me? Thanks in advance!

Just installed SD3 today after using SD2 for a few years. Can I get access to S3 support forum as well ?

Thx in advance !

Greg