ENB should not cause the WOFF manager to crash to desktop as it is not loaded at that time. ENB will run once you click on start mission and the CFS3.exe gets loaded. Then, if you crash, it will go back to the WOFF manager and usually you'll see a "dll" error message window.

EDIT: Two things I am guessing that is happening is that you are overwritting the sweetfx with enb or AnKor's shadow mod is not set up correctly.

Also, you can try to reinstall the full directx package.

i did fresh clean WOFF install, using directx full package from WOFF and i never use sweetfx before for my WOFF as i really want to try my ENB setup for WOFF but after ENB didn't work out then i use sweetfx as an alternative so i didn't overwrite anything.
my ENB works perfect with CFS3 and ETO mod but not with WOFF
i might be missing something here that the game system won't allow this ENB file into the game and still want to find out what im missing

Sry Robert ...but that link dont work and I'd like to try this ENB

WOKI, is there any errors in Logs\EnhancedShaders.log when you try to run the game with ENB?

Also note that - unlike the original CFS3 - WOFF v2.0 is DirectX 9 game. You don't need to use DX8 versions of ENB mods.