This is Firmware to update your printer using a network connection. To learn how to find out what version of firmware you have, please follow the instructions below:
1. Turn the printer on and make sure no paper is loaded.
2. Press and hold the [Feed] button until the DATA indicator lights in red.
3. Insert a piece of genuine Brother thermal paper into the printer’s paper input slot. The report will print automatically, and then the printer will return to the idle mode.
4. When the list of printer settings is printed, check the following item under "Current Settings".
"PROGRAM VERSION : PJ-Main VX.XX"

For details about how to update Firmware, see "How to install" on the screen displayed after clicking the "Agree to the EULA and Download" button.