Q: How do I associate .gpx, .loc, .gpz files with QuakeMap?

A: Use Map-->Options-->Files menu, select file extensions, click Apply.

Now you can just double-click on a file to bring up QuakeMap and open the file.

.gpx files are standard GPS Exchange format files used by many programs to store waypoints, tracks and routes.

.loc files are Geocaching.com downloadable cache files

.gpz files are renamed .zip files, containing .gpx and .loc files together with .jpg digital photos. Click here for more info.