Hi There - Downloaded zip file will not open http://dl.orbbec3d.com/dist/openni2/OpenNI_126.96.36.199.zip.
tried multiple machines
Please try this link to download the OpenNI files:https://orbbec3d.com/develop/.Hope it can help you.
That's where I downloaded it from and I can't open the zip file with Windows Explorer either. It seems that every other unzipping program (I've tried 7Zip and macOS's The Unarchiver) is able to handle it.