Problems importing GPX files

Hi,

I make tracks in Google Earth and export them as KML or GPZ files and then import them into Garmin Basecamp.

I then Export them from Basecamp as a gpx files, email them to my phone and open them in ExploreOz.

Up until recent times this has worked well. In recent times Exploreoz does not want to take them, it may part upload but generally just freezes.

The files are not large, they will open in OSMAND app on my phone easily.

Any tips

Thanks