After you have installed the Strymon Nixie software, connect the pedal to your computer through a MIDI interface. Launch the program and Nixie will automatically detect any connected pedals and prompt the Firmware Updates Required window if your pedal requires a firmware update to use the software. Click the Update button to update the firmware of the selected pedal.
If your pedal is already compatible with Nixie, but need to perform an update to the latest firmware, select Firmware Update from the Device menu option, then, select to Install the Update.
Once the update is completed, a window will appear to notify you that the update has completed.