Try and install DirectX 9.29 (you/ they have DX YZ installed, I know, give it a try anyway). The engine switched to a newer DX9 version some time ago because of some bugs in the previous 9.0c build. Some users had to install that new version although they were running DX10 or DX11 already.
"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual
