I asked the following question to try and get VR working. I purchased Xplane through steam;
Your question on X-Plane Q&A has been answered by Intridia:
Run the X-Plane 11 Installer.exe tool and check box the box that says "check for new betas as well as updates" when running the update before hitting next.
Your question was:
How can I download 11.20 to use VR
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I have updated to 11.20, but now it is asking for a CD key, unfortunately as it was purchased through steam its not showing up where it normally would so I am stuck in demo mode? Any ideas?