Someone's asked me to supply a .gpx file for an Audax ride I did last year. I have a Garmin .gdb file comprising the download from my GPS unit after completing the ride. I know how to cut it up into sections of no more than 500 trackpoints but I'd also like to strip off the speed data (yes, embarrassingly slow!) to leave just the bare track or ideally the trackpoints with lat., long and altitude.
I've got TCX Converter but I can't figure out if it will do the above. Without getting too technical, if possible, is there a simple, reliable and quick way of doing this?