I bought a bundle and it installs the basic game and Aftershock at once. How to install just game without DLC and then DLC when I finish the game?

This is super strange I cannot uncheck DLC during install, it is gray, can't untick it.
Thanks for help

The base gameplay have no majority changes with DLC installed. What's why is no sense to deinstall DLC for base game to play.
New type of enemies, weapons and tools available only in Aftershock and Arrange Mode. Original Campaign plays the same with DLC or without it.