Sorry for the confusion. I was actually referring to the trouble minimizing the main program itself... When I click on the Minimize button on the top right corner it doesn't work. Try to right click on it in the working tab (on the bottom of the screen), all options are greyed out...
I am using Windows XP Home as well... I guess it might have been my system.. but I have no problem minimizing other programs though... Only Main Type 2.1 can't minimize....