Thanks
Yes, I did try to erase the cache but nothing.
I actually found another version of cure, probably not really "official" and ... tadaaaaa, is working !!!
I wonder what is the difference between that one (https://www.dropbox.com/sh/s43vqzmi4d2bqe2/AAADdYdSu9iwcKa0Knqgurm4a?dl=0 ) and the official one.
Anyway as now, Cura 3.6.0, 4.4.1 and 4.5.0 downloaded from the official site are NOT working on my machine.
The one downloaded from Dropbox works perfectly.
Why ? Don't know !
Thanks !!