Edit: This fix didn’t work out, sorry. No further testing required for the moment.
I was told that the Nvidia card can be directly selected by an application on an Optimus system by selecting a different D3D adapter. I have no way of testing this since I do not own an Optimus device.
If you are an Optimus user (and only if you are an Optimus user) please download this version, test it on your system, and leave feedback below.
(link removed, this fix does not work)
Also, please do not get your hopes up just yet that this will fix the Optimus issue. Since I have no way of testing it I have no idea if it will work.