That's what happens, when you deal with stolen goods.

Why can't you just install and authorize your legal version? Assuming you bought this from MakeMusic, their customer service should be able to help you.

You can open a support ticket with the Submit a Request tab at the top pf this page.

I've installed my legal version and the serial number is still the one from the crack version... Using the crack version brings nothing good, it's really bad, that's why I decided to buy a legal version....

Have you tried uninstalling and deleting the old version?

>Have you tried uninstalling and deleting the old version?<

https://makemusic.zendesk.com/hc/en-us/articles/115003352327-Uninstalling-Finale

You may have to do additional steps clean out the old version completely—try the above first, though. How to do this will depend on your OS & version and what was done to crack the install such as disabling SIP. 

In this case, we may need to know if you ever had older versions of Finale products installed. You won't have to remove any scores created in the cracked version.

As you can see, it's possible to list your particulars here as to your hardware and operating system in your MM User Profile. That way it always displays.