In fact my error was to "Import" the file and not "Open"!
(cube of the first post who was not a component)
So it was automatically transformed in a componnent! (doh of the day for me)
In fact seems you are not obliged to Edit the Component!
Just Erase the Geolocalisation and save file seems sufficient...
or maybe not if many different localisations are possible in a same file?
Thanks for have found the trick! 😎