google earth

I have been looking through forums to research. I have found a lot of old wreck sites and have even verified a few. Now with this being said.....I do not wish to disclose a location or area yet I know people look at these forums and the Florida law blah, blah. My question is has anyone used...

I just upgraded my GPS device to a new Garmin Oregon 550t. I have a large database of GPX, KML, KMZ and XML files I would like to find a windows application that will do the following: Convert the file format easily from one type to another Will use Google Earth to place Topo's, Aerial...