Ensure you are using the 64-bit version of MultiKey.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\4D36E965-E325-11CE-BFC1-08002BE10318 UpperFilters LowerFilters in the right pane. If they exist, right-click and Restart your PC Complete Reinstall : Uninstall the device in Device Manager Virtual Usb Multikey Code 39 Windows 11
Here’s a draft for a post regarding This topic typically relates to software protection dongle emulation (often for industrial, CAD/CAM, or specialized engineering software). Ensure you are using the 64-bit version of MultiKey