Why is Lightroom keep asking for Serial Number ?

So i got this invite code for a free copy of Lightroom with my Leica camera, and even thou the box says it includes Lightroom 5 i was taken to a Lightroom CC instead. Nothing wrong with that i thought, so i downloaded, installed and started it. Works perfectly fine, but every time i open Lightroom again it says im on trial and keeps asking for a serial. The download page noted that i don't need any serial and i can simply use it by logging in with my newly set up AdobeID, which i was doing.

So, did i miss something or why is Lightroom still on trial ? I have never gotten a Serial to enter, only the Redeem Code that says i don't need a serial.

Im confused.

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iMac 21,5 and 10.11 btw.