CCcacher

Good tip, I'm going to give it a try. Thanks.

The filter Last GPX Update "Not During" the last "10 Days" also works. You can then either delete these caches, or Database > Move/Copy Waypoints these caches into another database for archival. This filter can be saved and doesn't require tweaking everytime you want to run it.

Who are these "cccachers" I see referred to in the forums? The quotes certainly don't appear to apply to me.