Since I was able to access the Minecraft Dungeons beta, following my registration, I have tested it two-three times.
However, by closing the game correctly each time and re-opening it at another time, I noticed that my backup no longer appeared, exactly as if I had just started the game for the first time with, in addition, all the settings reset.
I first performed a repair, going through the parameters of the launcher, without success, and then I reinstalled the game, without success there too.
Do you have any idea what the problem was ?
Thanking you, cordially,
Frédéric P. (SpaceFred_21)