I can't link my Beatport/Beatsource Account to TRAKTOR Pro 3.5.3

Hey guys! First time poster here. :) 

I just started getting into the NI ecosystem and I find NI support to be amazing when it comes to account related stuff, so I thought I'd share my findings regarding Beatport login and hopefully help some of you guys out!

I subscribed today, and tried to log in with no success. With a bit of digging about what actually happens when you log into beatport, it appears as if Traktor, when making a request to authorize with Beatport, will tell Beatport API that it should redirect to a protocol that Traktor doesn't seem to be able to handle. In Windows, this is stored in the registry under HKEY_CLASSES_ROOT. It basically has entries that say for example that when browser visits a link with a scheme, which application should open it.

So basically what happens is, you log into beatport, beatport tries to redirect you to a URL with a protocol that should open Traktor, and post the login code into Traktor. Based on the last post from Brian, it is possible that one of the previous versions had this URL scheme enabled, but the currrent one doesn't. 

So let's get nitty gritty and get this fixed! Disclaimer: digging around the registry is usually not advised, this should be pretty safe though (and this works for windows).

A short summary of what we will do. We will add two entries to the registry through the administrator command prompt. One will tell the system where the traktor pro is located, and the other one will tell the system that whenever a traktor:// link is encountered, it should open it with traktor pro, allowing the login to happen.

First, open a text editor like notepad, and paste in the following: reg add HKCR\traktor\shell\open\command /ve /d "<path to your traktor install> %1%" /t REG_SZ

Replace <path to your traktor install> with the location where your traktor exe is located - to find this right click on traktor in the taskbar, right click on traktor pro, and select properties. The path to traktor is what is in the box that says Target. paste that into the command above and keep it safe.

Press Win+R, type "cmd" (without quotes) into the prompt, 

Hold ctrl+shift and press enter, it should prompt you if you want to allow the app to make changes, select Yes

Into the black and white terminal, paste the following: reg add HKCR\traktor -v "URL Protocol" /t REG_SZ

Press enter

Into the same terminal, copy and paste the command we stored in the text editor before.

Press enter

Now when you try to log into beatport from traktor pro, the browser should ask you if you want to open the link in traktor pro once you log in, and voila! If you still have issues, let me know and I'll do my best to help. :)