Downloads
USB Drivers for Win98 (320KB zip)
USB Drivers for WinXP to Win10 (2.5MB zip) - based on FTDI CDM20830
FTDI Driver Install Guides here
Install guides are from the FTDI website - use the "Manual Installation" section. FTDI make the USB chips in our cables so simply use the FTDI install guides but instead of using standard FTDI drivers, use the customised PLMS drivers from the links above. Don't use standard FTDI drivers from their website - use the PLMS drivers.
Please note that all USB devices are serialised, so if you have multiple USB ports then your computer will ask to install the drivers separately for each port that you plug into.