Game Input MultipleXer

Hello I'm using a GIMX Adapter.
When I try to update firmware I get a this message "avrdude.exe" - " The program can't start because libusb-1.0.dll is missing from your computer.Try reinstalling the program to fix the problem." I don't know where to download the file from. As I was reading through the guide: https://gimx.fr/wiki/index.php?title=Gu ... g_firmware
I couldn't find anything about the file.

Thank you for your time

Please provide log file for investigation.

This file should be in the installation directory. Try reinstalling. If the file is still not present, check if your antivirus is not removing the file.

Also please post the GIMX version you are using (version number + i386 or x86_64).