Making changes there is not going to make any difference as you're just modifying the shell of explorer.
If you want it to always open maximized, you need to open a folder explorer, maximize it, then close it. It will then always open maximized (until you shrink it and then close it).
Minimized as in taskbar or minimized as in not maximized?
It remembers your positioning and state, you can just double click the title bar to maximize and when you reopen it should be in the same place.