You can do that from the File Menu that is located in the upper left hand corner, by clicking the Open button from the toolbar directly underneath the File Menu, or by using the Ctrl + O keyboard shortcut. The main panel on GPXSee’s interface doesn’t display anything, not until you load a GPX or another supported file into the application. This means you’ll have to download an installer, run it, and then follow the steps presented onscreen: accept the license agreement, select the components that will be installed, choose where the application will be installed, launch the installation and wait for it to complete. To get GPXSee up and running on a Windows-powered computer, you will have to complete a standard installation procedure. On top of that, I like that GPXSee can handle other file formats (TCX, KML, FIT, IGC and NMEA), that it provides support for multiple platforms (Windows, Mac, and Linux), that it has a user friendly interface that’s easy to navigate, and that it’s free and open source software. I like this application’s name, for the clever and concise way it presents the main thing that this tool does: it lets you 'see' GPX files.

Download the new version GPXSee 13.5