[b0b0baggins]

A solution I can confirm as working
(thanks Michael2063 & Fritcsh)

create an xml file called "advancedsettings.xml"
include the following text

<advancedsettings>
<video>
<forcedxvarenderer>false</forcedxvarenderer>
</video>
</advancedsettings>

save it to %appdata%\Kodi\userdata\
(for example C:\Users\[YourUserName]\AppData\Roaming\Kodi\userdata\advancedsettings.xml)

references :
http://forum.kodi.tv/showthread.php?tid=278799
http://kodi.wiki/view/AdvancedSettings.xml