SamyGO

Go to samsung support page, enter your model and you get right firmware.
Other way - check the very first service menu screen - here is your firmware listed.
It could be - you have other firmware on board than listed on developbyte.

Better you believe your TV, not unconfirmed info from internet...

Thanks for your report!

Look at our compatibility table, your firmware is not fully supported by samygo, we miss some work around and you are right person for that. Keep posting.