Preprocessor error

Hey guys!
I am new here as I have never used SweetFX.
When I install SweetFX on ETS2 I get this error when I open the game:
E:\Steam\steamapps\common\Euro Truck Simulator 2\bin\win_x64\SweetFX/Shaders/Main.h(42, 11): preprocessor error: redefinition of 'USE_SHARED'.
E:\Steam\steamapps\common\Euro Truck Simulator 2\bin\win_x64\SweetFX/Shaders/Main.h(62, 11): preprocessor error: redefinition of 'USE_SHARED'.
E:\Steam\steamapps\common\Euro Truck Simulator 2\bin\win_x64\SweetFX/Shaders/Main.h(67, 11): preprocessor error: redefinition of 'USE_SHARED'.
E:\Steam\steamapps\common\Euro Truck Simulator 2\bin\win_x64\SweetFX/Shaders/Main.h(72, 11): preprocessor error: redefinition of 'USE_SHARED'.

Could someone help me with this as I really want to use SweetFX.

You sure you downloaded the latest version from this site? Because that was a bug in the shaders that was fixed not long ago.