After reviewing your link, my existing bluray drive happens to be on the list. But I didn’t do any flashing or anything along those lines. I just downloaded the software at it worked and so I paid for it.
I have the LG WH16NS40 for your reference
edit: checking out the FAQ on the site, looks like for 4k blurays it is recommended to flash the firmware, I only have 1 4k bluray (I don’t have a 4k TV) and it seemed to rip fine but I used handbrake to downscale it to 1080p to save space since I don’t have a 4k television