In this video, Lars Fredriksen from TC Electronic guides you through the process of how to firmware your Ampworx pedal.
The firmware can be found on the specific product page.
Here are the links to the two Ampworx Series pages that contain links to the six individual Ampworx pages.
Ampworx Vintage Series
https://tcelectronic.com/series.html?category=R-TCELECTRONIC-AMPWORXVINTAGESERIES
Ampworx Hi-Gain Series
https://www.tcelectronic.com/series.html?category=R-TCELECTRONIC-AMPWORXHIGAINSERIES