MHZ VR (STILL!) un-purchaseable; shows as already in library; won't launch — MH-Zombie Steam update #1159256

I'm getting reports that MHZ VR is un-purchaseable; it shows as already in your library, but won't launch. EDIT: The change didn't work. Still working on the issue! I've made a change, but can't test it, so let me know if it's purchaseable/works now for you! I'm curious how the beta testers are getting on, because they were fine before launch, and I didn't ban their codes, so it should still have worked for them. Thanks for your help and support, and sorry for the hiccup! -Joe