I just installed a newly purchased copy of X-Plane 9. Program seems to be running fine, but there are no Maximize or Minimize buttons in the upper right hand corner of the simulation window. Additionally, I cannot re-size the main simulation window or configuration windows by mousing to the edge of a window, clicking and then dragging the window borders. In a previous homeschool version of X-Plane, I could do these things. Do I have an installation problem?