Anti-aliasing parameter causing incredibly blincking graphical bugs

After the new update (and the rest of my graphical option), I have 2 bad surprise :
1- the anti-aliasing method had been reset to TXAA
2- it look that the option to change it had been removed.

The problem is that I need MXAA, TXAA cause major difficulties, like every light being replace with a 1-colored plate so shiny that I can't look at my screen if a light is on it. Maybe an incompatibility with my nvidia card, but at least, the solution was simple, before the mod : change TXAA for MXAA.
Id would like to play, but each time there is a light on a map, I can't see anymore.

Where have this option been moved ?
Is there an other way to solve it than replacing TXAA by MXAA ?

PS : no configuration problem here, my computer is 2 or 3 time more powerful than needed.

EDIT : found a solution : using an external program to change the graphical options with more advanced options than the Neverwinter's option menu : GeForce Experience, you save my eyes !
But using external solutions is not what I call a real solution...