Impossible to transfer my gpx files from basecamp to my edge 1040 after downloading the last update version 20.19...

Since the last update 20.19 loaded to my gps edge 1040, i can't no more transfer the gpx files inside via basecamp. .

Please help me to provide a way either to go back to the last version of the edge 1040 before this 20.19 version or solve the problem via a new version.

When i connect by usb my edge 1040 under basecamp a new message saying that i can't send tracks and waypoints to my gps 1040....I have never read such a message in basecamp before when i was  connecting my edge 1040 with the previous version !