Allez pour changer un peu, une horreur informatique logicielle :

Minecraft Launcher wipes entire install location when uninstalling :
When a player selected a custom "Install Location" in the Dungeons installation dialog, the Dungeons Launcher was taking that location and naively considering that only files written by the Dungeons Launcher would live there. Thus, when uninstalling the Launcher, the uninstall logic would simply delete that "Install Location" folder, to leave no traces of program files created by the Launcher on disk.

We didn't consider that the custom location chosen by players could also have files belonging to other programs in it.