Izzy,
I asked Garmin about options for importing and exporting GPS data and they offered this as well:

"Or you can download one of the following. These are not produced by GARMIN and GARMIN does not endorse these products or guarantee that they work.

http://gpsinformation.net/
http://www.gartrip.de/
http://www.easygps.com/download.asp
http://www.sni.net/~lwjames/GPSPRO.html

I've never used any of these but you may find the last one -- which I can't get to show up as a link -- worth a try. It is supposedly for MACs only