How to share multiple .gpx files

I have accumulated a number of recorded .gpx files that I want to export to my PC.  I can tap each .gpx file to use 'Share' from 'Choose action'.  I do not know how to share or export multiple .gpx files.  I can 'Delete All' but not share all.  I am used to executing a long press on one file in other applications with an option that follows of selecting all files.  I cannot find such a facility in MapFactor Navigator Free.