Instead of risking a crack, you can use the official version of safely:
Check if your status qualifies you for educational pricing on similar tools. Safe Alternatives
A lower-cost subscription tier for accessing the library.
Look for reputable open-source recording software (like Audacity) that can record system audio, though this is a manual and time-consuming process.
The official site offers a trial period that allows you to test the conversion quality (usually limited to the first 3 minutes of each song) [2].