Are you trying to run this on an older computer (e.g., XP/Win7), or are you trying to find a solution for a modern Windows 10/11 system? Knowing this will help me suggest the best path forward.

Installing obsolete software ( .exe ) from third-party sites poses a high risk of malware. Additionally, running this version on Windows 10/11 may cause severe stability issues.

Consider upgrading to modern alternatives like TimeZero (TZ) Navigator , which is the successor to MaxSea, offering modern charting, high-resolution bathymetry, and full AIS support.