The new game released today is having some troubles when being uninstalled. Apparently, there is an issue that causes the game to delete everything within the folder that Delta Rune is installed in.
Toby Fox, Undertale and Delta Rune’s creator, has since tweeted about the issue stating not to use the games uninstaller when deleting the game.
Hey apparently the uninstaller for DELTARUNE just deletes the entire directory the uninstaller is in. Depending on where you installed it, this could have some consequences. I recommend you don’t use the uninstaller.
— tobyfox (@tobyfox) October 31, 2018