Thanks Emre, yes I will find a solution
UE+TM-Content-Pack consumes a lot of space, so I made the mistake of uninstalling them. Yesterday I reinstalled everything and here is what I opted for:
The importer is now absent from the EU. I've notified this issue, by the time it's resolved I'll probably be on another project.
In any case, when we want, we find a solution.
It is above all a lot of frustration and waste of time.
(I blame myself as much as I blame the TM team.)