In that case, you go through this link - https://support.smartbear.com/message/?prod=ReadyAPI. And provide below information:-
What is the type of request? - License Inquiry
What are you struggling with? - I need to reuse the license on a new PC
Can you deactivate the license from the old PC? - No, My old PC crashed or as re-imaged
Are you a registered SmartBear customer? - No, I am not a registered customer.
Enter your organization email and the full name and finally enter short description of the issue,
This will for sure, resolve your issue.