#50 UsbDevice.AllDevices empty

[Dino]

I try to use LibUsbDotNet in order to communicate with a USB device. DeviceNotify works fine but UsbDevice.AllDevices is empty and OpenUsbDevice doesn't work. After using install-filter-win.exe and adding filter for my device I find it in UsbDevice.AllDevices. In my development PC I can add filters but how I can manage other PC where I install my software ? Must I install lib-usb on every PC manually adding filters?
Thank you very much