Finally got it working. Had to uninstall everything. Unplug all of the DK2. Reinstall 0501. Then plug in the DK2. Then Vorpx. All is working now. Setting up Skyrim to be playable a bit more challenging but progress is being made.
I’m having the same problem. DK2, runtimes 0501, 06, 07 and Vorpx refuses to see the oculus despite several installs/reinstalls.
I’m using the same hardware setup as the OP although I am using the most updated Nvidia drivers (358.50) and Vorpx cannot find the Rift when I try to configure it. I’ve tried DK2 runtimes 0501, 06 and 07. The demo scenes all work fine and many of the demos from Oculus share do as well, but Vorpx simply cannot find the Oculus. No reply yet from support. Anyone have helpful ideas?