@sebastiengros - Sorry to hear that you’ve run into another issue.
That error does seem like a new GPU driver could be the issue. Depthkit 0.8.1 was tested against Nvidia 55x drivers at release, and hasn’t presented any major issues with 56x and 57x drivers (with one minor exception), but it’s possible that the 58x driver you have installed interacts with the Depthkit application differently than earlier versions.
I recommend rolling back the GPU driver to 553.62, and then see if you can load the Depthkit Edit context.