Why does Adobe change my Browser search preferences?

I just upgraded Adobe Flash Player.  The install did NOT ask permission to change my search preference from Google to Yahoo, but it made the change.  Now I cannot change it back regardless of my preferences as listed.  Several questions.

1. Why did you NOT ask my permission to make this change?

2. Now how do I reset Google as my search engine instead of Yahoo since doing so does NOTR change the search engine.  I'm pissed folks.