well, given i said the masters meaning the github master branch that you mentioned yourself, that answers that by your own statement.
but yes the master branches gets updated regularly; however, if you follow the TeamCity link and login as a guest and download the file that gives you the pknx.exe it does not give all the options for randomizing. for example in the trainers option of pknx, when you open the executable, with the updated masters there should be an option for gigantamax and dynamax levels. But on the contrary what i do see is an option for mega evolutions, despite the master files being updated. So the TeamCity downloadable of pknx is not being, but the source/master files have been. And not having an updated main files for pknx that doesn't give all the proper options as the masters offers is less than desirable.
Now by your statement the masters (should be) compiled into the usable executable that people would use to get the most out of the randomizer options - if i am understanding you correctly. Personally, I am not aware of how to compile the masters. Any assistance on how that is done would be greatly appreciated. I'm sure I am not the only one experiences issues with missing features.