you might be able to fix GED: Check if the file "mtlfx.c" exists in the "code" folder. if yes, rename or delete it there. It should only exist in the "include" folder.
Thanks SchokoKeks, without mtlFX.c it works!
"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual