USB redirection software is typically licensed based on the number of "USB servers" (the computer where the device is physically attached) or the number of simultaneous device connections. Starting Price $74.99 Home and small office use (2+ devices). RDP Edition $89.99 Accessing USB devices within Remote Desktop or VM sessions. Technician Edition $9.90/mo Remote servicing, flashing, or repairing customer devices.
I tested three different “license key” generators from sketchy forums. Results:
: In many configurations, the USB Redirector Client for Windows is free, but a license may be required if connecting USB devices from a Linux-based USB server. Securing Your License
⭐⭐⭐☆☆ (3/5 – with caveats)