Hi,
I have an old Lego MindsStorms RCX USB tower (USB\VID_0694&PID_0001) which until recently I could install a filter for with the libusb-win32 filter installer. I could then access the device from .NET code using the LibUsbDotNet NuGet package. Recently (since last Windows Update?) the RCX USB tower device no longer shows up in the Device Selection list. I use the WinUsb driver for it since there is no proprietary 64bit driver available.