I encourage you to explore legitimate options for obtaining software, such as purchasing a license directly from the developer or checking for free trials/demo versions.
While the search for an “easy cd-da extractor 16.1 activation key” may stem from a desire to avoid paying, the risks and downsides far outweigh the perceived benefit. Modern versions of EZ CD Audio Converter are affordable, secure, and regularly updated. The free trial lets you test thoroughly before spending any money.
Cracks are malware traps, and the old version lacks modern security patches.