Install the newest version of MergeNav (1) First delete the old version usind Add or Remove Programs on the machine if needed (2) Copy GSCnav.xmz to your Documents folder. This file contains the ship track data for all GSC expeditions (3) Install MergeNav_Setup.msi ( double click on it ) Then give it a try and report back Bob courtney.bob@gmail.com bob.courtney@canada.ca