CUDA stopped working with my video conversion programms

I was using Mirillis Action and Freemake Video Converter, previously I was able to convert video with GPU Acceleration, now it doesn’t work anymore. The only thing that I changed was Nvidia drivers for my gtx 660 ti. Is there some fix for this? Conversion using only my processor takes very long time.

edit: Found the solution. With 377.88 drivers CUDA work with mentioned above programs. 340.52 have something broken in drivers that blocks CUDA in some programs.

Same problem here, I have the 340.52 and CUDA it’s broken…