the fix didn’t stick… When I tried plugging into an LED wall controller as the second display, Touch dropped to 1fps again. I tried switching all sorts of settings in the NVIDIA control panel with no luck. Rebooting was no help. This meant opening and closing a full screen window every time I wanted to make/view a change to my Touch project. When I tried doing the trick again back home on my projector (recreating same setup that worked before) I was also unable to get it working. Stuck in 1fps limbo 
Just wondering if this happens using both the HDMI output and the thunderbolt-minidisplayport outputs? If you are using just one, have you tried the other?
I have tried both, as well as running through HDMI splitters (attempting to trick HDCP)
When I get the chance, I’ll try with the new official build and report back.