THANKS SO VERY much for responding and for updating Import Aura cloud .backup file into Neo4j Desktop - #2 by pthomasz
As to the where from here.... when this issue was reported and my subsequent learning of renaming the file from .backup to .dump I then reported this to engineering ask that they improve Desktop, and that a .backup and .dump would effectively be the same.
No guarentees to when this improvement may be available