Please note that you are using a very very old version of c4doctane plugin.
Unfortunately Nvidia has broken the drivers some time ago under Windows, and versions prior to 4.02.1 are no longer working with recent Nvidia driver versions.
You should need to downgrade the Nvidia driver by performing a clean installation of 417.71 version:
https://www.nvidia.com/Download/driverR ... 1906/en-us
To perform a clean installation, please follow these steps:
But we highly suggest to upgrade c4doctane to v4.05-R7, fully compatible with latest Nvidia driver.
You can find 4-05-R7 by visiting your personal Downloads area:
https://render.otoy.com/account/download_archive.php
You need to select your purchased version from the Select Software pop up:
Probably you will have to upgrade your version 3 licenses to version 4. This upgrade is free and can be done visiting the following link:
https://render.otoy.com/shop/upgrade.php?
ciao Beppe
