I agree with Ankur Bose. You can install: Matlab, Simulnik and UAV Toolbox to start modeling. But if you want to generate a code for a device such as pixhawk 1 or Cube 2.1 then you will get a message that you need Simulink Coder and Matlab Coder. I also have an Embeded coder and generating the correct code on these six elements works nicely. Remember about the seventh element that you must have visible in the add-ons - "UAV Toolbox Support Package for PX4 autopilots" that will appear after finding and installing it from Add-On explorer.
Yes, this is also marked below at requires: