I recorded a track, saved it in gpx format and clear it.
I open the track in "Explore Landmarks" menu and display it. I find a fake segment on the track with just one point. I though to remove this segment by editing the gpx file in ES Explorer. In "Displayed Landmarks" I remove all open tracks.
Without exiting the AQ: I remove the fake segment in ES Explorer. I reopen the gpx file in AQ and display the track, but the supposed "removed" segment stills there.

I exit from AQ and launch it again. When I reopen the gpx file in AQ, all was OK. No fake segment there.
I think that maybe AQ makes some information cache that prevents the sync of the external modified gpx file when reopened in AQ without exiting AlpineQuest.
Thanks
Rac