VRWorks 360 Video SDK 1.0 Invalid device error

Hi There
The previous version of VRWorks 360 Video SDK worked fine for me with my GeForce GTX 850M
Now I got the latest version 1.0 and I am getting Invalid device error when running nvstitch sample. The new documentation mentions that it is for newer cards. Is there a way to make it work with previous cards? Most of our clients do no use the latest cards yet. Thanks