Can no longer export selected data

Hello 

I am on Basecamp 4.8.11

Previously I was able to select Waypoints in BaseCamp and "Export selected user data" to a .gpx file. Later I would manually copy that file from my computer to my Garmin Edges's NewFile area to import them into my Garmin Edge 1030.

This was standard practice for many years.

Now, Basecamp hangs every time I try and "Export selected user data".

Does anyone have any advice.

Thanks

Ted S