The above is the first bolded line of the OP. To me it says "You need to install MM", and then "This version of KWRocketry does not require you to install MM". As I said above, I have been using KWRocketry without issue and not having installed MM. I did use the install for dummies guide, which worked perfectly, and also does not at any point instruct you to install MM.
So, the advice is to re-word the second line of the OP to be more clear on your intent. Should I or should I not install MM? If yes, the install for dummies should also contain this step.