LYWSD03MMC Previously flashed with ATC

[Spookster]

I have a few LYWSD03MMC that I wish to convert to zigbee, they have previously been flashed with https://github.com/atc1441/ATC_MiThermometer

When I open the link here via pvvx (android phone) the flasher detects ATC_xxxxx and pairs with it.
It detects the alternate firmware

I click on TelinkOTA, but which firmware do I need to upload for flashing?

If not possible to flash directly from here, which steps do I need to follow?

As an aside - I literally threw 10 ble sensors in the bin as Ive already changed them out for zigbee sensors, when this tutorial popped up in my feed, so I dumpster dived and retrieved them :p

[pvvx]

README.md
Alternative firmware and configurator from ATC1441 (variant ATC_Thermometer.bin) can be found here: atc1441/ATC_MiThermometer.

Use file "ATC_v46.bin"

To flash the Zigbee firmware, use a Google Chrome, Microsoft Edge or Opera Browser.
Paragraph 5.
Alternatively you can choose a specific firmware binary (i.e. the original firmware) via the file chooser. Example: In the file name field paste "https://github.com/pvvx/ZigbeeTLc/raw/master/bin/1141-020a-01173001-Z03MMC.zigbee".