I'm wondering if the Vive Focus Plus can be tethered to a PC to run PC-based VR apps, similar to Oculus Link. I found this page here that says to simply set the USB configuration mode to "USB Tethering". However, the only options are "Charging" and "MTP (Media Transfer Protocol)". I've updated to the latest firmware. Was this option removed? I've downloaded and have been running the Viveport PC app, but I can't get the headset and the app to notice each other.