Introduction
GPS Simulation files are stored on the user’s local drive in the Documents\GPS 1.0 folder. Each file is a .csv file that can be opened and modified using a text editor or Microsoft Excel.
Step 1. Click on the File menu item:

Step 2. Next, click on the Open menu item. Alternatively, type Ctrl-Shift-O to immediately begin the opening procedure.

A dialog will open, allowing you to select the file you wish to open.
Step 3. Navigate to the GPS folder and select the file to open. Click the open button.

The file will be opened and ready for use.