You can download a trial version that works for 30 days. It runs in one-hour sessions, after which you must restart your notation software.
Instead of a crack, consider these legitimate and safe ways to access NotePerformer: noteperformer-crack
If you already own an older version (like NotePerformer 3 or 4), the upgrade to NotePerformer 5 is currently free for registered users. Risks of Cracked Software You can download a trial version that works for 30 days