create a fresh Custom Map File. You can delete the old one, or just save the new custom map over the old one.
GPS Data File
This file format contains all the GPS navigation information (waypoints, event marker icons, routes and trails) used by your GPS unit and MapCreate. The file extension is *.usr (for User file) and the file is saved either to your hard drive or directly to your MMC or SDC. As with other
ASCII Text File
This is a universal text file format compatible with word processors and other software programs. MapCreate can exchange routes and waypoint lists with other mapping programs by importing and exporting GPS information as
GPS Data Manger (GDM) File
This is an older file format used by MapCreate 5 and MapCreate 4 to hold navigation data (waypoints and such). MapCreate 6 can open these files, making the program backward compatible with versions 5 and 4. The GDM file extension is *.low. Although MapCreate 6 is designed to load and read older GPS Data Files in the *.low format, MapCreate 6.0 also allowed users to choose to save new files in the older format (though the program could not actually save them). This has been corrected in version 6.2. You can still open files in either format, but you can now only save GPS Data Files in the newer *.usr format. Please note that your MapCreate
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