Never pay for firmware. It is a factory-supplied file meant to be shared at no cost.
Before opening BarTender, install the Seagull Scientific Drivers for Xprinter. This allows the software to recognize the device as a valid output. bt2016r33094ulxprinter free
: "2016" may denote the year of manufacture or the base software version (e.g., BarTender 2016). BarTender Software How to Find the Real Model & Drivers Never pay for firmware