Good catch, thanks for the report.
Prune doesn't export timestamps to KML anyway (there's no good place to store them unless you make all the points waypoints and put the timestamps in the waypoint names). But you're right, the timestamps should be exported to GPX. And saved to text - the problem is that the timestamp isn't given to the point at all. That should be an easy fix.
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Good catch, thanks for the report.
Prune doesn't export timestamps to KML anyway (there's no good place to store them unless you make all the points waypoints and put the timestamps in the waypoint names). But you're right, the timestamps should be exported to GPX. And saved to text - the problem is that the timestamp isn't given to the point at all. That should be an easy fix.
Fixed for version 10 - timestamp is taken either from exif tags or file timestamp