Click on Software Licensing and Support and I clicked activate registration code page, I need to enter "registration code".
How can I get my registration code?
Once you buy a Codewarrior license, you receive an email with the registration code to generate your license.dat file.
In the following link you can select the CodeWarrior licence for your product.
CodeWarrior Development Suites | NXP
Once you have the Registration Code, you can activate it following the steps mentioned in How to register and activate my software|NXP video.
Please let me know if you have additional questions.