This morning the tablet auto updated to this new version.

Now SKYDEMON is useless. It remains frozen with the rotating logo and nothing happens.

I uninstalled and reinstalled. The first time it opens, but I can't insert custom waypoints, custom aircrafts... I have no meteo and notam updates.

Once closed and reopened, it remains frozen....

If I'm not mistaken, you should be able to get an APK from the customer service for an earlier version of SD for you to manually install. But as others have stated, maybe it's time for an upgrade.