Be cautious when downloading .exe files from unofficial aviation forums; always scan files for malware and prefer reputable community sites.

. While professional-grade CBT software is typically proprietary and expensive, several legal and free resources are available for study. Overview of Boeing 737 CBT

While full-version professional software often requires a paid license, several legitimate free resources exist for students and enthusiasts. :

Boeing 737 MAX Update: Recovered and Getting Better Every Day