Hi Johan,
If you've a Professional registration you will have access to all license files listed under the link:
CodeWarrior Dev Tools Suite - Professional|NXP
This includes the license file for HC12 V5.x development tool.
Please log to your Freescale account to download the appropriate tool and license file.
Refer to:
Accessing new products and licenses from CodeWarrior!~
Have a great day,
Pascal
NXP Technical Support
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