For example 'C:\Windows\system32\javaw.exe' or 'C:\Windows\SysWOW64\javaw.exe' Maybe you need to enter the full path of your windows directory instead of %windir%. If you're only using the 64bit version of Java your standard java path should be %windir%\SysWOW64\javaw.exe.
%windir%\system32\javaw.exe -Xmx256m ='C:\Program Files (x86)\Steam\SteamApps\common\The Witcher Enhanced Edition' -DTW.language=3 -jar TWEditor.jar Properties of the TWEditor shortcut (excuse the German language) If your language is not mentioned above, search here ) The chosen language for the Editor has NO influence on the game, it's just easier to find the right items in the Editor. 16(The menue of the Editor is always in English language but the ID sets the language of items and their discriptions.