How to use the studio version?

I just download the studio version recently. its said needs a password. after I register i got nothing. So i have to ask for help at here.
https://forum.blackmagicdesign.com/
https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=139205
Cyrus_0128 wrote:I just download the studio version recently. its said needs a password. after I register i got nothing. So i have to ask for help at here.