[ALTgr] + [x] download 4rtist.com/de.zip includes a setup.exe and an update....bat* file + the 4rtist.com/de.klc#__source_file

if you intend to change to another version or an own layout
►try to uninstall the layout by clicking the setup.exe again
if this doesn´t work, try an layout named too "de" and use the update.bat file
( copies and overwrites "de.dll" in the folder /windows/system32 )