The specific topic you mentioned——strongly suggests a pirated or unofficial version of the software. Searching for "serial keys" or "portable" versions from third-party sites carries significant risks:
Unauthorized versions often can't access Traktor Pro 3’s frequent updates, integrated mapping for new controllers, or metadata syncing. A Better Way to Get Started: integrated mapping for new controllers
DJ software requires deep integration with your computer's audio drivers (like ASIO or Core Audio). "Portable" versions often bypass these, leading to audio dropouts or crashes mid-set. integrated mapping for new controllers
Files labeled "incl serial" or "portable" from unofficial sources are high-risk targets for malware and keyloggers that can compromise your laptop. Stability Issues: integrated mapping for new controllers