There is nothing you can do. With the 1.10.7.0 patch, a new cloud rendering system was introduced which is incompatible with your GTX 780 Ti, as well as all GeForce 600/700/800 and some 900 series GPUs. Your GPU is now considered obsolete by the simulator, and according to support responses, it will probably remain unsupported. Only solution is to play with Clear Skies for now.
They also said that probability of this issue getting fixed depends on the amount of reports they receive about this issue. So if you’d like to help change their mind, send a Zendesk report for the issue, and please upvote the following threads I’m linking.