1. There will shortly appear a new version 2.4.1 on the plugin page. It includes only one change. I hard coded a MadCatz controller for a user so that the plugin would retain the ProductId and VendorId between sessions if the controller was unplugged and then plugged back in later. Most folks won't need this verison.
2. If you are trying to run Mach 3 on Windows 7 64 bit or Windows 10 64 bit, the plugin will give you an error. You can fix it by downloading
This is listed as XBox 360 Accessories Software 1.2. There is no choice for Windows 10. You have to pick the Windows 7 64 bit option. It will let you download the file XBOX360_64ENG.Exe.
3. I will shortly be working on porting the plugin to Mach 4. Please be patient.