Below is a link to the current USB Firmware Updater installers, one for Windows computers and another for Mac OS X computers. This program is used to update firmware on these products:
Instructions for updating firmware is found in the Instruction Manual for these products.
Download the into a temporary folder. Uninstall any previous version of USB Firmware Updater before running the downloaded installer.
Note: This program requires that the FTDI D2XX Direct USB driver be installed on your PC. This is normally pre-installed but if not you will need to download and run a driver installer from the official FTDI download page. Installers for both 64-bit and 32-bit Windows® PCs are available there.
Mac OS X Installation:
This is a Mac OS X Disk Image file. After downloading open it and move the app to folder of your choice. It has been tested on OS X "El Capitan","Sierra" and "Mojave" only.
Note: This program requires that the FTDI D2XX Direct USB driver be installed on your Mac. This is normally pre-installed but if not you will need to download and run a driver installer from the official FTDI download page. The download page offers a Video Install Guide which show you how to do this.
Attention: Due to problems with the way macOS interoperates with FTDI USB<->Serial converter chips, you must install the D2xxHelper program from FTDI, even if you don't need to install the D2XX USB driver. You can download this from the official FTDI download page. Run this to install the D2xxHelper program. This is needed for USB Firmware Updater to detect devices connected to the USB port.